If there is no discomfort in general, the symptoms of headache after blowing the fan, caused by the following main causes: 1, acute upper respiratory tract infection, if the patient’s resistance is low, the cold may cause acute upper respiratory tract infection, such as headache, runny nose, nasal congestion, pharyngeal pain, etc.. It is more common in children and elderly people. Acute upper respiratory tract infections are self-limiting and can be treated by drinking more water, taking rest and taking acetaminophen tablets.2. The head is rich in blood vessels and vasoconstriction caused by cold can lead to vasospasm and headache, which may be caused by cerebral artery spasm. 3. Chinese medicine believes that the symptoms of headache after cold are caused by the invasion of wind evil into the body and belong to the category of wind headache. If you have a headache, it is best not to blow directly against the fan, but to strengthen your body with exercise.