High fever rash may be caused by viral infections, allergies or other diseases secondary to treatment methods need to be based on the patient’s age and symptoms for a comprehensive judgment: a. Children with high fever rash: mainly caused by viral infections, such as early childhood emergency rash, chicken pox, measles, etc. 1. Early childhood emergency rash: mostly seen in young children about a week, characterized by the appearance of a rash after the fever subsides, red or light red, pressure of fading, generally The rash is finished within 24 hours, the chest and abdomen are more intensive, the extremities are less, no scarring and pigmentation after fading, the prognosis is better, you can take acetaminophen and other symptomatic treatment under the guidance of the doctor; 2, chicken pox: common in autumn and winter and other low temperature season, manifested as high fever fever, in the fever at the same time or 1-2 days after the appearance of red rash, can be accompanied by cough, diarrhea and other symptoms. Fever-reducing drugs, such as acetaminophen, can be taken as prescribed by the doctor. Hormonal drugs are generally not used to prevent the spread of the virus. Localized itching can be relieved with glycopyrrolate lotion, avoid scratching and infection, and in case of rupture, choose the appropriate antibiotic ointment to apply to the affected area as prescribed by the doctor; 3. Measles: red maculopapular rash with high fever, runny nose, conjunctival congestion and other symptoms, which may cause complications such as pneumonia and encephalitis, measles is highly contagious and requires good isolation and protection. Physical antipyretic or antipyretic drugs can be used as prescribed by the doctor, and antibiotics should be used to control infections when they occur. 4. Other diseases: such as scarlet fever, which can also lead to a high fever rash, the rash is mostly distributed in the armpits, groin and neck, and the tongue appears strawberry-like when the rash starts, i.e. strawberry tongue, and the rash starts 1-2 days after the high fever and gradually fades after about 3 days. Pay attention to good isolation and protection, and keep the skin clean, can follow medical advice to use penicillin or cephalosporin drug treatment. Second, adults with high fever and rash: may be caused by allergies, diseases or other factors. 1, allergic factors: allergies may cause high fever and rash, such as drug allergies, the skin surface will appear red or but light red rash, can be accompanied by high fever appear. At this time should be immediately away from allergens, and follow medical advice to use anti-allergy drugs, such as dexamethasone, etc.; 2, disease factors: such as suffering from malignant tumors, will also appear high fever rash, such as suffering from malignant lymphoma, leukemia, etc., need to go to the hospital in a timely manner for blood tests, clear causes for the primary disease treatment, such as targeted therapy, immunotherapy and radiotherapy, etc.; 3, other factors Adults with high fever and rash may also be caused by infection with chickenpox, measles virus, etc. They can be treated with physical cooling or antibiotics such as penicillin as prescribed by the doctor, and pay attention to good isolation measures to avoid infecting others. During the treatment process, the patient’s clothes, bedding and daily necessities should be disinfected regularly, and attention should be paid to opening windows and ventilation to prevent secondary infection. And wear loose, soft, comfortable and breathable clothes to prevent stimulating the skin lesions and aggravating the discomfort. Eat more fresh fruits and vegetables to consume enough vitamins, and also eat more vitamin A rich foods such as spinach, carrots, pumpkin, etc., and drink more water to help the body recover and accelerate the rash fading.