Can you wash your hair when you have a fever?

　　Fever refers to an elevated body temperature. Generally speaking, mild fever allows for washing hair; however, if the fever is high and accompanied by significant discomfort, washing hair is not recommended. It is advisable for patients to seek timely medical attention at a hospital and follow professional medical instructions for treatment. The analysis is as follows:

　　When body temperature is below 38.5℃ and there are no obvious symptoms of discomfort such as dizziness, headache, poor mental state, or body aches, you may choose an appropriate water temperature for washing your hair. Washing hair not only cleanses the scalp and removes dirt and excess oil, but also promotes blood circulation in the scalp, helping to relieve fatigue and improve the scalp environment. At the same time, washing hair can also promote the body's metabolism, aiding in the removal of waste products and toxins, which can be beneficial for recovery.

　　When body temperature rises above 39℃ or you feel very weak, dizzy, or extremely fatigued, washing hair might consume excessive energy, increase physical strain, and could even lead to fainting. In such situations, rest should be prioritized, and activities that might cause physical discomfort, including washing hair, should be avoided.

　　After washing hair, it should be dried quickly with a hair dryer to prevent catching a chill. Additionally, attention should be paid to keeping warm during the hair-washing process, avoiding excessively low indoor temperatures or overexposure to ventilation.