Summer dehydration can trigger sickle cell crisis: Experts urge patients to stay vigilant

Rising temperatures and fluid loss can increase the risk of painful sickle cell complications. Doctors advise hydration, heat protection and early medical attention to prevent crises.

As temperatures rise across several parts of India, doctors are warning that dehydration, often considered a routine summer concern — can become a serious health threat for people living with sickle cell disease (SCD).
For most individuals, dehydration may cause temporary fatigue or discomfort.

However, in people with sickle cell disease, reduced fluid levels can trigger changes in blood circulation, increasing the risk of painful and potentially severe complications.

Sickle cell disease is an inherited blood disorder in which red blood cells become rigid and take a sickle-like shape instead of remaining flexible. These abnormal cells can block blood vessels, reducing oxygen supply to tissues and organs and leading to complications such as vaso-occlusive pain crises and acute chest syndrome.

Dr. Vikas Dua, Principal Director and Head of Pediatric Hematology, Hemato Oncology and Bone Marrow Transplant at Fortis (Gurgaon) said dehydration during summer should not be viewed as a minor issue for individuals with SCD.

“While dehydration may seem like a seasonal discomfort for most people, it can be a significant trigger for painful and potentially life-threatening complications in individuals living with sickle cell disease,” he said.

Why summer heat increases sickle cell risks

During hot weather, excessive sweating causes the body to lose fluids. When those fluids are not adequately replaced, blood volume can decrease and blood can become more concentrated.

In sickle cell patients, this increased blood viscosity can encourage red blood cells to become more rigid and block small blood vessels, triggering painful episodes.

Dr. Dua explained that heat exposure, prolonged sun exposure and physical exertion can further increase the likelihood of a sickle cell crisis during summer.

Possible complications linked to dehydration include:

• More frequent painful vaso-occlusive episodes requiring hospital care
• Increased risk of acute chest syndrome
• Worsening kidney-related complications
• Severe fatigue and reduced quality of life

India carries a significant burden of sickle cell disease, particularly among tribal communities and populations in central and western regions. The government has launched the National Sickle Cell Anaemia Elimination Mission to improve screening, awareness and access to treatment.

Early warning signs should not be ignored

Doctors say recognising early symptoms can help prevent severe complications.

Dr. Jagriti Yadav, Medical Director – Lab Operations at Cryoviva Life Sciences, said symptoms such as fatigue, headaches and irritability during summer may sometimes be mistaken for normal heat exhaustion but could indicate dehydration or the beginning of a pain crisis.

“Excessive loss of fluid can make the blood more concentrated, which ultimately increases the risk of red blood cell sickling,” she said.

Dr. Akash Khandelwal, Consultant Hematologist at Kailash Hospital (Noida) said children and adults with sickle cell disease need to take extra precautions during heatwaves, travel and outdoor activities.

He said warning signs such as fatigue, dizziness, headaches, reduced urine output or increasing pain should not be ignored.

Simple precautions can prevent serious complications

Experts emphasise that many summer-related sickle cell complications can be prevented through simple but consistent measures.
Key precautions include:

• Maintain adequate hydration: Drink sufficient water and recommended fluids regularly throughout the day, even before feeling thirsty.
• Avoid excessive heat exposure: Limit outdoor activities during peak afternoon hours and stay in shaded or cool environments.
• Plan travel and outdoor activities carefully: Carry water and take frequent breaks during physical activity.
• Monitor symptoms early: Seek medical advice promptly if pain episodes persist or are accompanied by fever, chest pain or breathing difficulty.

Dr. Khandelwal said dehydration and heat exposure are among the most common preventable triggers for sickle cell complications and require greater awareness among patients, caregivers and healthcare providers.

As temperatures continue to rise, doctors believe awareness about seasonal triggers can play an important role in reducing avoidable hospitalisations and improving quality of life for people living with sickle cell disease.

Article Source:

https://www.firstpost.com/health/summer-dehydration-can-trigger-sickle-cell-crisis-experts-urge-patients-to-stay-vigilant-ws-e-14024744.html/amp