Cancer pain affects millions of people around the world, but understanding how to manage it effectively can transform the experience of living with cancer. From standard medications to innovative treatments being tested in research settings, there are more options than ever to help control pain and improve daily life.

Understanding the Path to Pain Relief

Pain is one of the most common experiences among people with cancer. Research shows that around 64% of individuals with advanced or spreading cancer report feeling pain, while 59% of those currently receiving anti-cancer treatment experience it^[14]. Even after successful treatment, about one-third of patients continue to have pain as a lasting effect^[3]. This means that managing pain is not just about treating cancer itself—it’s about improving how people feel every single day during and after their cancer journey.

Pain control is a critical part of cancer care because it directly affects quality of life. When pain is well-managed, people sleep better, have more energy, and can stay more active^[17]. Being active reduces the risk of complications like pneumonia, blood clots, and bedsores that can occur when someone is unable to move around comfortably. Additionally, research has shown that when patients report their symptoms regularly and receive proper pain management, they experience better quality of life, fewer unexpected hospital visits, and even improved ability to continue with cancer treatment itself^[14].

The foundation of cancer pain treatment is a personalized approach that considers each person’s unique situation. Factors such as the type of cancer, the stage of disease, previous treatments, and individual patient characteristics all influence how pain is managed^[6]. The good news is that pain can be relieved to some extent in most cases through proper treatment^[20]. Medical societies have established standard treatment guidelines, and at the same time, researchers continue to explore new therapies through clinical trials—organized research studies that test whether new treatments are safe and effective.

Where Cancer Pain Comes From

Cancer pain has many different causes, and understanding what’s behind your pain helps doctors choose the most effective treatment. The cancer itself can cause pain when a tumor grows large enough to press against nerves, bones, or other organs in the body^[4]. As the tumor expands, it can squeeze delicate structures or release chemicals that trigger pain signals. Sometimes cancer spreads to bones—a process called bone metastasis—which is the most common cause of pain in advanced cancer^[14]. This type of pain is often described as a dull ache or throbbing sensation^[2].

Cancer treatments themselves can also lead to pain. Surgery may damage nerves or create scar tissue that causes discomfort long after the operation^[4]. In fact, about 40% of patients continue to experience pain from surgery even after their cancer is cured^[23]. Chemotherapy can lead to a condition called peripheral neuropathy, which causes numbness, tingling, burning sensations, or shooting pain in the hands and feet^[3]. This happens because certain chemotherapy drugs damage nerves, and for some people, these symptoms persist even after chemotherapy ends.

Radiation therapy can cause pain in several ways: it may inflame the lining of the mouth and digestive tract (a condition called mucositis), irritate the skin, or cause discomfort from lying in the same position during treatment sessions^[3]. Some supportive medications used during cancer treatment also have pain as a side effect. For example, drugs called bisphosphonates, which are given to strengthen bones when cancer has spread there, can sometimes cause jaw pain. Medications that help the body produce more white blood cells, such as filgrastim and pegfilgrastim, commonly cause bone pain^[3].

It’s also important to remember that not all pain in someone with cancer is necessarily related to the cancer itself. People with cancer can experience everyday aches and pains from conditions like arthritis, headaches, constipation, or digestive problems, just like anyone else^[4]. Additionally, some people experience phantom pain, which is pain that seems to come from a part of the body that has been removed by surgery, such as a breast after mastectomy^[4]. This type of pain is very real and occurs because the brain’s pain-processing areas continue to send signals even though the physical structure is no longer there.

How Doctors Assess Your Pain

To provide effective pain relief, healthcare providers need detailed information about what you’re experiencing. They will ask you to describe your pain in specific ways: where exactly it hurts, what it feels like (sharp, dull, burning, tingling, aching, cramping, or throbbing), how intense it is, when it happens, and what makes it better or worse^[2]. Many doctors ask patients to rate their pain on a scale from 0 to 10, where 0 means no pain at all and 10 represents the worst pain imaginable^[2].

Keeping a pain journal or diary can be extremely helpful. This is a daily record where you write down when pain occurs, how bad it is at different times of day, what activities make it worse or better, and how well your pain medications are working^[25]. Recording this information helps your healthcare team see patterns and adjust your treatment plan accordingly. Some people now use mobile device apps to track their pain, which can make it easier to remember details and share information with their medical team^[25].

Your healthcare team will also want to know how pain is affecting your daily life—whether it interferes with sleep, eating, work, or spending time with family and friends^[2]. Pain that prevents you from doing things you enjoy or that lasts for months or years is called chronic pain, and it requires a different management approach than short-term, or acute pain, that goes away once healing occurs^[2].

Standard Treatment Approaches for Cancer Pain

The foundation of cancer pain management is medication, which is chosen based on the type and severity of pain. The World Health Organization developed a framework many years ago that helps guide doctors in selecting the right pain medications^[20]. This approach starts with simpler medications for mild pain and gradually moves to stronger options if needed.

For mild to moderate pain, doctors often begin with non-opioid medications. Paracetamol (also known as acetaminophen) is commonly used because it’s generally well tolerated, doesn’t upset the stomach, and doesn’t thin the blood^[17]. It’s particularly helpful for reducing fevers and relieving bone pain, and is often used alongside stronger medications. Aspirin-like drugs, called non-steroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen, are used for bone pain and pain caused by inflammation^[17]. However, these medications can sometimes cause stomach problems like indigestion or bleeding, so they’re not suitable for everyone^[11].

When pain is moderate to severe, or when simpler medications aren’t providing enough relief, doctors prescribe opioid medications. Opioids are drugs derived from or similar to substances found in opium poppies. Common opioids include codeine, morphine, oxycodone, hydromorphone, and fentanyl^[11]. These medications work by attaching to specific receptors in the brain and spinal cord that block pain signals. While opioids are very effective for cancer pain, they can cause side effects including nausea, vomiting, drowsiness, and constipation^[2].

Managing side effects is an important part of opioid treatment. Constipation is particularly common and often requires patients to take stool softeners or laxatives regularly to prevent discomfort^[11]. Nausea often improves after the first few days of taking an opioid, but anti-nausea medications can help if needed. Drowsiness typically decreases as the body adjusts to the medication. Because different opioids affect people differently, doctors sometimes switch from one opioid to another—a process called opioid rotation—to find the best balance between pain relief and tolerable side effects^[6].

Opioids can be taken in various forms depending on individual needs. Pills and liquid forms are taken by mouth, which is often the easiest and most preferred method. Skin patches release medication slowly over several days. Injections under the skin or into a vein can deliver medication quickly when needed. Some people with severe, ongoing pain use a device called a patient-controlled analgesia (PCA) pump, which allows them to give themselves small doses of medication through an IV line by pressing a button when pain increases^[6].

The duration of pain treatment varies greatly depending on each person’s situation. Some people need pain medication only during active cancer treatment, while others require long-term management, sometimes for months or years^[6]. Regular follow-up appointments are essential to adjust medications as needed, monitor for side effects, and ensure that pain remains well-controlled. Doctors carefully monitor patients who take opioids long-term to optimize treatment and minimize the risk of complications, including misuse^[6].

Adjuvant Medications That Support Pain Relief

Adjuvant medications are drugs originally developed to treat other conditions but have been found to help with certain types of pain, particularly nerve pain. These medications are often used alongside standard pain relievers to provide additional relief or to target specific pain mechanisms.

Antidepressant medications, particularly a drug called duloxetine, have been studied for treating chemotherapy-induced peripheral neuropathy and have shown promising results^[3]. These medications work by affecting brain chemicals that influence both mood and pain perception. Anticonvulsant medications, which were originally developed to prevent seizures, can also help control nerve pain by calming overactive nerves that send pain signals. Corticosteroids (steroid medications) may be used as adjuvant treatments because they can reduce swelling and inflammation that contribute to pain^[6].

Beyond Medications: Other Treatment Options

While medications form the backbone of cancer pain treatment, several other approaches can provide significant relief. When cancer has spread to bones, specific treatments can strengthen the bones and reduce pain. Bisphosphonates are medications that help prevent bone breakdown and can reduce pain from bone metastases^[20]. Radiation therapy can be directed at bone metastases to shrink tumors and relieve pressure on surrounding structures, often providing substantial pain relief^[20].

Nerve blocks are procedures where a doctor injects medication directly into or near a nerve to stop it from sending pain signals. This approach can help relieve cancer pain that is difficult to treat with oral medications alone^[19]. For some people with severe, localized pain, more invasive procedures such as surgery to remove or reduce tumor size may provide relief.

Many people find that combining medical treatments with complementary approaches enhances their overall pain management. Techniques such as acupuncture—which involves placing fine needles at specific points on the body—has been studied for treating chemotherapy-induced peripheral neuropathy with some reported benefit^[3]. Massage therapy applies gentle pressure to muscles and may help with relaxation and pain relief^[29]. Other approaches include reflexology, aromatherapy, hypnotherapy, and meditation^[29].

Relaxation techniques can be particularly powerful because anxiety and stress often make pain feel worse. Progressive muscle relaxation involves systematically tensing and then relaxing different muscle groups throughout the body. Deep breathing exercises help calm the nervous system. Some people find that imagery—creating peaceful mental pictures—helps distract from pain. Listening to calming music, watching television, reading, or chatting with friends can also take your mind off discomfort^[25].

A device called a TENS machine (transcutaneous electrical nerve stimulation) delivers small electrical pulses through pads placed on the skin, which may help block pain signals traveling to the brain^[29]. While more research is needed to fully understand its effectiveness for cancer pain, it has few side effects and some people find it helpful.

Most Common Treatment Methods

• Non-opioid pain medications
  • Paracetamol (acetaminophen) for mild to moderate pain, fever, and bone pain, often used alongside stronger medications
  • Non-steroidal anti-inflammatory drugs (NSAIDs) like ibuprofen for bone pain and inflammation-related pain
  • Generally well-tolerated but NSAIDs can cause stomach irritation in some people
• Opioid medications
  • Codeine, morphine, oxycodone, hydromorphone, and fentanyl for moderate to severe pain
  • Available in various forms including pills, liquids, skin patches, and injections
  • Side effects may include constipation, nausea, drowsiness, which can usually be managed
  • Different opioids work differently for different people, so switching medications (opioid rotation) may be needed
• Adjuvant medications
  • Antidepressants like duloxetine for nerve pain, particularly chemotherapy-induced peripheral neuropathy
  • Anticonvulsant medications for nerve pain by calming overactive nerves
  • Corticosteroids to reduce inflammation and swelling that contribute to pain
• Treatments for bone pain
  • Bisphosphonates to strengthen bones and reduce pain from bone metastases
  • Radiation therapy directed at bone metastases to shrink tumors and relieve pressure
• Nerve blocks and procedures
  • Injection of medication into or near nerves to stop pain signals
  • Surgical procedures to remove or reduce tumor size when appropriate
• Complementary approaches
  • Acupuncture for chemotherapy-induced peripheral neuropathy
  • Massage therapy for relaxation and muscle tension relief
  • Relaxation techniques including meditation, progressive muscle relaxation, and deep breathing
  • Imagery and distraction techniques
  • TENS machines for localized pain relief

Innovative Treatments Being Studied in Clinical Trials

While standard treatments help many people with cancer pain, researchers continue to search for better, safer, and more effective options through clinical trials. Clinical trials are carefully designed research studies that test new treatments before they become widely available. These studies typically progress through three phases: Phase I tests safety and appropriate dosing in a small group of people; Phase II examines whether the treatment actually works and continues to monitor safety in a larger group; Phase III compares the new treatment to existing standard treatments in an even larger group to see which works better.

Research into new pain medications continues to explore substances that might provide relief with fewer side effects than current options. Scientists are investigating how different molecules interact with pain pathways in the nervous system, looking for targets that can interrupt pain signals without causing the problems associated with traditional opioids. Some studies focus on medications that work on specific receptors in the nervous system that are involved in pain processing but are different from the receptors that opioids target.

Natural products are also being investigated for their potential to treat specific types of cancer pain. Research into various supplements and plant-derived substances for chemotherapy-induced peripheral neuropathy has shown mixed results^[3], but studies continue as researchers work to identify which substances might be beneficial and under what circumstances.

Another area of research involves finding better ways to deliver existing medications. Scientists are developing new formulations that provide more stable pain relief, reduce side effects, or are easier to use. For example, researchers are working on skin patches that release medication more consistently, or pills that dissolve more slowly to provide longer-lasting pain control.

Studies are also examining combination approaches—using multiple treatments together that work through different mechanisms to provide better pain relief than any single treatment alone. This might involve combining traditional medications with newer targeted therapies, or integrating pharmacological treatments with innovative non-drug approaches.

Clinical trials for cancer pain management take place in many locations around the world, including the United States, Europe, and other regions. To participate in a clinical trial, patients typically need to meet specific criteria related to their type of cancer, the kind of pain they’re experiencing, what treatments they’ve already tried, and their overall health status^[3]. Healthcare providers can help patients find appropriate clinical trials and determine whether participation might be a good option for their individual situation.