Having a headache in a muggy environment indicates that the patient has a vascular headache or migraine, the most common functional headache that can be triggered by many factors. Sultry environment is the more common factor, other factors like temperature change, altitude change, cold wind and cold, staying up late, poor sleep, bad mood, as well as drinking a lot of alcohol, drinking strong tea and coffee, eating chocolate and cheese products, etc., may trigger headache. The mechanism of occurrence is the dysfunction of vasoconstriction and dilation in the brain, which is usually vasodilatation during the attack period, and there may also be abnormal secretion of neurotransmitters in the brain, which is related to the secretion of 5-hydroxytryptamine. When this kind of headache occurs, it can be temporarily treated symptomatically with analgesic drugs, commonly ibuprofen or naproxen. If the attacks are frequent, oral Chinese medicine can be used to regulate the vascular function, such as Tianshu capsule, Tianmain capsule or Headache Ning capsule.