Triggers for Sickle Cell Disease Crisis

What Is a Sickle Cell Disease Crisis?
“It is the worst pain you’ve ever experienced in your life,” says Jeffrey Woodson, who has lived with sickle cell disease for many years in St. Louis. “At its worst, it feels like every bone in your body is broken as you’re trying to move around — like a dagger slowly being driven into every muscle and bone in your body.”
- Acute chest syndrome: A pneumonia-like illness
- Blood clots: When sickled red blood cells stick together
- Chronic pain: Pain that lasts longer than six months
- Spleen complications: Swollen spleen with left-sided abdominal pain
- Leg ulcers: Open wounds from blocked blood flow
- Liver disease: Can include liver damage and gallstones
- Necrosis: Bone or tissue death
- Painful erections: Can last four hours or more
- Stroke: Blood flow blockage that causes brain damage
Common Sickle Cell Crisis Triggers
Dehydration
Dehydration is Woodson’s number one trigger. “The more I can stay hydrated, the better chances I have of not setting off a pain episode,” he says.
People with sickle cell disease lose water more easily because their kidneys aren’t as efficient, says Crawford Strunk, MD, a hematologist at Cleveland Clinic and the codirector of the Sickle Cell Medical Neighborhood, a lifespan sickle cell comprehensive center in Ohio. “So especially in hot weather, they need to make sure that they're staying appropriately hydrated,” says Dr. Strunk.
Extreme Temperatures
“Without fail, being cold and wet is an automatic ‘I’m going to have a real bad episode’ situation,” says Woodson, who rarely goes swimming during the summers, even on extremely hot days.
“Even if the pool is heated, and it’s been hot for several days, I am extremely cautious because a small gust of wind as I’m coming out of the pool or walking into air-conditioning can become problematic,” says Woodson.
Sudden shifts in weather can also prompt a crisis, says Strunk. “The change in temperature is what really drives it.”
High Altitudes
Physical and Emotional Stress
Poor Sleep
Infections
Sickness can be a crisis trigger, says Strunk. “Colds, flus, anything that's going to stimulate your immune response is going to overdrive your sickle cell disease as well.”
How to Avoid Sickle Cell Crisis Triggers
Once you learn your sickle cell crisis triggers, you can take steps to avoid them and prevent a crisis.
Dress for the weather. Dress in layers so you can regulate your temperature easily during the day. You have to plan for changing weather, especially in spring and fall, when temperatures can fluctuate, says Strunk.
You may not always know your triggers, but over time, you'll start to recognize them, says Strunk.
“It wasn’t until I was having more frequent episodes that I started taking inventory and noticing what was triggering me,” says Woodson.
How to Manage a Crisis
“Since there are levels to an episode, some actions can trigger small episodes in a specific area, and if caught early enough with pain meds, hydration, and heating pads, it won’t last long and won’t spread to other areas of my body,” says Woodson.
- Drink plenty of water.
- Massage painful areas.
- Take over-the-counter medications approved by your hematologist, like acetaminophen (Tylenol) or ibuprofen (Advil).
- Place a warm pack on the painful area or take a hot bath. (Never use cold packs or ice to relieve pain.)
- High fever
- Trouble breathing
- Pain that doesn’t improve with treatment at home
- Severe vomiting or diarrhea
- Headache or dizziness
- Pale skin or lips
- An erection lasting over two hours
- Seizures
- Confusion or slurred speech
- Abdominal swelling that happens quickly
- Vision changes
- One-sided weakness
The Takeaway
- A sickle cell crisis happens when red blood cells get stiff and sticky and block blood flow to parts of your body, causing severe pain.
- Sickle cell crisis triggers can include dehydration, sudden temperature changes, high altitudes, stress, poor sleep, and illness.
- Once you learn your specific triggers, you can try to avoid them, but if you do have a crisis, you can manage it with approved medication, warm packs, and help from your provider.
Resources We Trust
- Mayo Clinic: Sickle Cell Anemia: Symptoms and Causes
- Cleveland Clinic: Sickle Cell Crisis
- Sickle Cell Society: Day to Day Care to People With SCD
- Sickle Cell Disease Association of America: About Sickle Cell Disease
- National Heart, Lung, and Blood Institute: How Sickle Cell Disease May Affect Your Health
- About Sickle Cell Disease. Centers for Disease Control and Prevention. February 21, 2025.
- Borhade MB et al. Sickle Cell Crisis. StatPearls. February 25, 2024.
- Sickle Cell Crisis. Cleveland Clinic. August 29, 2024.
- Sickle Cell Disease: Causes and Risk Factors. National Heart, Lung, and Blood Institute. August 20, 2024.
- Complications of SCD: Pain. Centers for Disease Control and Prevention. May 15, 2024.
- Complications of SCD: Splenic Sequestration. Centers for Disease Control and Prevention. May 15, 2024.
- Complications of SCD: Leg Ulcers. Centers for Disease Control and Prevention. May 15, 2024.
- Complications of SCD: Liver Problems. Centers for Disease Control and Prevention. May 15, 2024.
- Complications of SCD: Priapism (Painful Erection of the Penis). Centers for Disease Control and Prevention. May 15, 2024.
- Living with Sickle Cell Disease – Triggers. Alder Hey Children's NHS Foundation Trust. August 13, 2024.
- Hackett PH et al. High-Altitude Travel and Altitude Illness. Centers for Disease Control and Prevention. April 23, 2025.
- Obadina M et al. High-Altitude Hypoxia Is Common in Adults with Sickle Cell Disease. Blood. November 2, 2023.
- Valrie CR et al. Sleep Problem Risk for Adolescents with Sickle Cell Disease: Socio-demographic, Physical, and Disease-Related Correlates. Journal of Pediatric Hematology/Oncology. March 2018.
- Britts R. Essential Guide to Caring for Someone with Sickle Cell Disease. Sickle Cell Association.
- Water: How Much Should You Drink Every Day? Mayo Clinic. January 21, 2026.
- Living With: Sickle Cell Disease. National Health Service. November 30, 2022.
- Sleep Deprivation and Deficiency: Healthy Sleep Habits. National Heart, Lung, and Blood Institute. March 24, 2022.
- 5 Things To Know About Relaxation Techniques for Stress. National Center for Complementary and Integrative Health. April 30, 2026.
- Sickle Cell Disease: Living With Sickle Cell Disease. National Heart, Lung, and Blood Institute. August 22, 2024.
- Arzoun H et al. Opioid Use in Patients With Sickle Cell Disease During a Vaso-Occlusive Crisis: A Systematic Review. Cureus. January 21, 2022.
- Steps to Better Health Toolkit: Managing Acute Pain. Centers for Disease Control and Prevention. May 15, 2024.

Walter Tsang, MD
Medical Reviewer

Abby McCoy, RN
Author
Abby McCoy is an experienced registered nurse who has worked with adults and pediatric patients encompassing trauma, orthopedics, home care, transplant, and case management. She is...