Sickle cell anaemia with crisis is a challenging condition that demands careful attention to pain management and prevention of complications. Understanding how to treat painful episodes, prevent infections, and access emerging therapies can make a significant difference in living well with this inherited blood disorder.

Treating the Crisis: Goals and Approaches

When someone with sickle cell anaemia experiences a crisis, the main goal of treatment is to relieve severe pain and prevent serious complications that can affect vital organs. A sickle cell crisis, also called a painful crisis or vaso-occlusive crisis, happens when sickle-shaped red blood cells clump together and block small blood vessels. This blockage stops oxygen from reaching tissues and organs, causing sudden and intense pain that can last from a few hours to several days or even weeks.^[1]

Treatment strategies depend on several factors: how severe the crisis is, where the pain occurs in the body, whether the person has other complications, and their individual medical history. Some people can manage mild crises at home with simple measures, while severe episodes require hospital care with powerful medications and close monitoring.^[8]

The overall approach to managing sickle cell disease includes not only treating acute crises when they happen, but also using preventive medicines to reduce the frequency of painful episodes, protecting against infections through vaccinations and antibiotics, and supporting the body’s ability to carry oxygen through blood transfusions when needed. Medical teams typically recommend that patients see their healthcare provider regularly—every three to twelve months depending on age and disease severity—to monitor the condition and adjust treatment plans as needed.^[18]

Standard Treatment Methods

Managing Pain During a Crisis

Pain control is the most urgent need during a sickle cell crisis. For mild to moderate pain, over-the-counter medicines like acetaminophen (often sold as Tylenol) or ibuprofen (sold as Advil or Motrin) can help. These medicines work by reducing inflammation and blocking pain signals. However, people with kidney problems need to be cautious with certain painkillers, and it’s important to discuss the safest options with a doctor.^[1][6]

When pain becomes severe, stronger prescription painkillers called opioids may be necessary. These include medicines like morphine, which are typically given in a hospital setting through an intravenous line (IV) directly into a vein. Medical guidelines emphasize that healthcare providers should not underestimate a patient’s pain. Prompt pain relief—ideally within 30 minutes of arriving at a hospital emergency department—is considered essential. Research shows that achieving good pain control early can actually shorten hospital stays, particularly in children.^[12]

Medicines to Prevent Crises

Several medicines have been approved specifically to reduce how often painful crises happen. Hydroxyurea (sold as Droxia, Hydrea, or Siklos) was the first medicine approved for sickle cell disease, back in 1998. It works by helping the body produce healthier red blood cells that are less likely to become sickle-shaped. When taken daily as a capsule, hydroxyurea reduces the frequency of painful episodes and can also decrease the need for blood transfusions and hospital stays. This medicine is now recommended for people as young as nine months old, and is considered standard care for sickle cell disease.^[11][14]

However, hydroxyurea can lower the number of other important blood cells, such as white blood cells and platelets, so patients taking it need regular blood tests to monitor their health. Additionally, women who are pregnant or planning to become pregnant should talk to their doctor, as hydroxyurea can harm an unborn baby and may need to be stopped before trying to conceive.^[11]

L-glutamine oral powder (brand name Endari) is another medicine that helps prevent crises. It was approved in 2017 for patients five years old and older. This medicine is an antioxidant that helps protect red blood cells from damage. It comes as a powder that can be mixed with water or food, making it easier for children to take.^[6][15]

Crizanlizumab (brand name Adakveo) works differently from the other medicines. It was approved in 2019 for patients 16 years and older. This medicine is given as an infusion—meaning it’s delivered directly into the bloodstream through a needle—once a month after an initial loading period. Crizanlizumab helps stop sickled cells from sticking together and blocking blood vessels. Each infusion takes about 30 minutes.^[6][15]

It’s worth noting that another medicine called voxelotor (Oxbryta) was used for several years to prevent red blood cells from sickling. However, in September 2024, the company that made it withdrew the medicine from the market due to safety concerns. The potential risks were found to outweigh the benefits, and patients who were taking it were advised to work with their doctors to switch to different treatments.^[6][14]

Preventing Infections

People with sickle cell disease are at much higher risk of serious infections because the disease damages the spleen, an organ that normally helps fight bacteria. Young children are especially vulnerable. To protect against infections, doctors prescribe daily penicillin, an antibiotic, for children from birth until at least five years old. Some adults may also need to take penicillin throughout their lives if they have had serious infections like pneumonia or if their spleen has been removed.^[13][16]

Vaccinations are equally critical. All the regular childhood vaccines should be given on schedule. In addition, people with sickle cell disease need special vaccines against pneumococcal bacteria and meningococcal bacteria, which can cause life-threatening infections. An annual flu shot is also strongly recommended because common illnesses like the flu can quickly become dangerous for someone with sickle cell disease.^[16]

Blood Transfusions

Blood transfusions replace sickled cells with healthy red blood cells from a donor. This increases the amount of normal hemoglobin in the blood and improves oxygen delivery throughout the body. Transfusions can be used to treat severe anemia when the body doesn’t have enough red blood cells, or to prevent complications like stroke. Some people need only occasional transfusions during severe crises, while others require regular transfusions—sometimes as many as 100 units of blood each year.^[10][20]

One type of crisis, called a hyperhemolytic crisis, can actually be triggered by blood transfusions. This happens when hemoglobin levels drop suddenly after receiving blood. Despite this risk, transfusions remain an important treatment option when carefully monitored by medical professionals.^[1]

Supportive Care During a Crisis

Beyond pain medicine, several supportive measures help the body recover during a crisis. Staying well-hydrated is crucial because dehydration can make sickling worse. Patients often receive fluids through an IV in the hospital to ensure they get enough. Oxygen may be given if blood oxygen levels are low. Keeping warm is also important, as sudden temperature changes can trigger or worsen a crisis.^[8][10]

Treatment in Clinical Trials

Stem Cell and Bone Marrow Transplants

A stem cell transplant, also called a bone marrow transplant, is currently one of the few methods that can cure sickle cell disease. This procedure works by replacing the patient’s bone marrow—the tissue inside bones that produces blood cells—with healthy stem cells from a donor. The new stem cells then produce normal red blood cells instead of sickle cells.^[13][15]

However, this treatment is not available to most people with sickle cell disease because it carries significant risks. The most serious risk is graft versus host disease, a life-threatening condition where the transplanted cells attack the patient’s own body tissues. Additionally, finding a well-matched donor can be extremely difficult. Because of these challenges, stem cell transplants are generally only considered for children and young people who have severe symptoms that haven’t improved with other treatments, and only when the potential benefits clearly outweigh the risks.^[13][15]

Gene Therapy: A Transformative Approach

In December 2023, a major breakthrough occurred when the U.S. Food and Drug Administration approved two new gene therapies for sickle cell disease. These treatments represent a completely new way of addressing the root cause of the disease by actually changing or adding genes in the patient’s own cells.^[14]

One type of gene therapy works by taking some of the patient’s own stem cells from their bone marrow, modifying a gene in those cells in a laboratory, and then giving the modified cells back to the patient through an infusion. The changed gene helps the cells produce healthy hemoglobin. The other type of gene therapy adds a completely new, modified gene to the patient’s cells. This new gene also instructs the cells to make better-functioning hemoglobin that doesn’t cause sickling.^[14]

These gene therapies are described as potentially transformative because they could provide a cure for many people with sickle cell disease. However, they are complex procedures that require specialized medical centers, careful patient selection, and intensive treatment protocols. Not every patient will be eligible, and doctors are still learning about the long-term effects and the best ways to use these therapies.^[14][15]

Ongoing Clinical Research

Medical research continues to search for better treatments and more effective ways to prevent complications. Clinical trials are research studies where volunteers help test new medicines or treatment approaches before they become widely available. People who participate in clinical trials sometimes gain access to promising new therapies that aren’t yet approved for general use.^[18]

These studies typically happen in phases. Phase I trials focus primarily on safety—researchers carefully monitor whether a new treatment causes harmful side effects in a small group of people. Phase II trials expand to more participants and begin looking at whether the treatment actually works to reduce symptoms or complications. Phase III trials are large studies that compare the new treatment directly with existing standard treatments to see if it’s more effective or has fewer side effects.^[12]

Researchers are investigating various approaches, including new medicines that target different biological pathways involved in sickling, treatments that reduce inflammation in blood vessels, and methods to help the body produce more fetal hemoglobin, a type of hemoglobin that naturally resists sickling. As these studies progress, they may lead to additional approved treatments in the coming years.

Most common treatment methods

• Pain management
  • Over-the-counter painkillers like acetaminophen or ibuprofen for mild to moderate pain at home
  • Prescription opioid medicines like morphine given through an IV in hospital for severe pain
  • Heating pads or warm compresses applied to painful areas
  • Individualized pain management plans developed with healthcare providers before crises occur
• Preventive medicines
  • Hydroxyurea taken daily to reduce the number of painful crises and decrease the need for transfusions
  • L-glutamine oral powder to help prevent crises by protecting red blood cells
  • Crizanlizumab given monthly by infusion to prevent sickled cells from sticking together
• Infection prevention
  • Daily penicillin antibiotics, especially for children under five years old
  • Regular vaccinations including pneumococcal, meningococcal, and annual flu vaccines
  • Prompt treatment of any fever or signs of infection
• Blood transfusions
  • Regular blood transfusions to replace sickled cells with healthy red blood cells
  • Emergency transfusions for severe anemia or complications
  • Exchange transfusions to lower the percentage of sickle cells in the blood
• Supportive care during crises
  • Intravenous fluids to maintain hydration and prevent further sickling
  • Supplemental oxygen if blood oxygen levels are low
  • Keeping the body warm to avoid temperature changes that can worsen crises
• Curative treatments
  • Stem cell or bone marrow transplant using healthy donor cells
  • Gene therapy that modifies a patient’s own cells to produce normal hemoglobin
  • Gene therapy that adds a new gene to help cells make better-functioning hemoglobin

Living With Sickle Cell Disease: Prevention Strategies

While treatment addresses crises when they happen, preventing them in the first place is just as important. Several lifestyle measures can significantly reduce the risk of triggering a painful episode. Drinking plenty of water—about eight to ten glasses every day—is one of the most important prevention strategies because dehydration can cause red blood cells to sickle more easily.^[8][18]

Avoiding extreme temperatures and sudden temperature changes helps protect against crises. This means dressing warmly in cold weather, avoiding very hot environments, and being cautious about activities like swimming in cold water. Even exposure to cold air or wind can trigger sickling in some people. High altitudes can also be dangerous because there’s less oxygen in the air at higher elevations, which can trigger a crisis. Mountain climbing or visiting high-altitude cities requires special caution, though traveling by airplane is generally safe because planes are pressurized to maintain steady oxygen levels.^[8][19]

Physical activity is important for overall health, but it should be moderate. Strenuous exercise that causes someone to become seriously out of breath can reduce blood oxygen levels and trigger sickling. It’s best to exercise with care, rest when tired, and drink extra fluids during physical activity. Getting enough sleep and managing stress through relaxation techniques like breathing exercises can also help reduce crisis frequency.^[8][21]

When to Seek Medical Help

Knowing when to go to the hospital is critical for people with sickle cell disease. Certain symptoms require immediate medical attention. A fever over 38°C (or any increased temperature in a child) is a medical emergency because it could signal a serious infection. Severe pain that doesn’t respond to home treatment, difficulty breathing, severe vomiting or diarrhea, severe headache or dizziness, and chest pain all require prompt evaluation.^[9][19]

Other warning signs include sudden swelling in the abdomen, painful erection lasting more than two hours (called priapism), confusion or drowsiness, seizures, weakness on one or both sides of the body (which could signal a stroke), changes in vision, very pale skin or lips, and a stiff neck. If any of these symptoms occur, contact a doctor immediately or go to the nearest emergency department. If you’re too unwell to travel yourself, call emergency services for an ambulance.^[19]

Make sure that medical staff know about your sickle cell disease whenever you receive care. Having your individualized treatment plan available can help healthcare providers give you the most appropriate and effective care quickly.