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Harmattan and Sickle Cell: Why the Cold Brings On a Crisis, and How to Prevent One

A sickle cell crisis in harmattan is common because cold narrows blood vessels and dry air drains water. Five daily habits can lower the risk.

Harmattan Cold Can Trigger a Sickle Cell Crisis. Here's How to Prevent It

The first cold harmattan morning means a sweater for most of us. For someone living with sickle cell disease, it can mean a painful crisis by evening.

Doctors explain why a sickle cell crisis in harmattan is so common: cold makes blood vessels narrow, so sickled cells get stuck more easily, and the dry air quietly drains the body of water. Nigerian haematologists told Gavi that cold is one of the hardest triggers.

Prevention is daily. Dress warmly, especially at night and early morning. Drink water all day, even without thirst. Keep taking folic acid and malaria prevention as prescribed, sleep under a treated net.

Go to hospital quickly for severe pain, fever, breathlessness, chest pain or sudden weakness. Our harmattan health guide has more cold-season tips.

This article is for general information and is not a substitute for professional medical advice.

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Sources

  1. Gavi VaccinesWork, "Nigerian 'sickle cell warriors' face new foe: climate change", July 10, 2024, https://www.gavi.org/vaccineswork/nigerian-sickle-cell-warriors-face-new-foe-climate-change
  2. The Sun (NAN), "Harmattan: Medical expert advises sickle cell patients to keep warm, alerts on increase in skin infections", https://www.sunnewsonline.com/harmattanmedical-expert-advises-sickle-cell-patients-to-keep-warm-alerts-on-increase-in-skin-infections/

This does not replace seeing a health worker. If you notice these signs, visit your nearest primary health centre or speak to a doctor or nurse. Any costs mentioned are general estimates and vary by facility and state.

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