Causes of malaria fever

Malaria parasites enter red blood cells and release substances as part of their life cycle. The immune response can produce recurring or persistent [Fever](/symptoms/fever/), [Chills](/symptoms/chills/) and sweats, along with headache, tiredness, nausea and [Muscle Aches](/symptoms/muscle-aches/). Fever may start while travelling or after returning, and its pattern cannot confirm malaria by itself.

Other infections can also cause fever, so a travel history is essential. A [Blood Test](/treatments/diagnostics-and-screening/blood-test/) can look for malaria parasites and guide treatment. Tell the clinician where you travelled, when you returned and whether you took preventive medicine.

Arrange prompt medical assessment for fever after visiting a malaria-risk area, even when the fever seems mild or you used mosquito precautions. Keep a record of temperature readings and symptom timing, drink fluids if you can, and do not rely on home treatment to exclude malaria. A [Travel Health Consultation](/treatments/occupational-and-travel-medicine/travel-health-consultation/) can help plan protection for another trip; [Malaria Prophylaxis](/treatments/occupational-and-travel-medicine/malaria-prophylaxis/) may be advised for some destinations.

Get emergency help for fever with confusion, unusual drowsiness, seizures, fainting, breathing difficulty, repeated vomiting, severe weakness, yellow skin or dark urine. These signs can indicate severe illness and should not wait for a routine appointment.

Ask whether your fever pattern and travel history require immediate malaria testing, whether testing needs repeating, which medicines are safe for you, and how to reduce risk on future travel.