Many people like to sleep with a fan during the summer heat, but sleeping with a fan may lead to disease symptoms in some people. Such as the elderly, infants, pregnant women and other people with weak constitution are more vulnerable to diseases than other people, mainly including respiratory diseases, neurological diseases, digestive system diseases, etc.: 1. Respiratory diseases: blowing fans to sleep may lead to symptoms of cold in some people, and the invasion of the respiratory system by wind evil may cause upper respiratory tract infections, cold symptoms, which may be accompanied by cough, fever and other symptoms; 2. 2, neurological diseases: such as fans blowing on the head for a long time, stimulated by the outside world may lead to headaches, dizziness, and even stroke and other diseases that cause symptoms of facial nerve paralysis, crooked corners of the mouth, speech leakage, etc. If the fan blows on the joints of the limbs for a long time, it may also cause symptoms such as arthralgia or neuralgia; 3. Digestive system diseases: If the abdomen is cooled when the fan is blown to sleep, symptoms of digestive system diseases such as abdominal pain, erratic, diarrhea may occur, leading to the occurrence of enteritis, gastritis and other diseases. Therefore, you should try to avoid blowing fans to sleep, and also pay attention not to sleep in wet places, do a good job of abdominal and joint location of warmth, to avoid being cold. Regular work and rest, reduce the number of late nights. If you experience any discomfort from sleeping with a fan, you should actively seek medical treatment at a hospital.