Butt airtight, long pimples itching is usually because of folliculitis, eczema and other reasons, can be treated by keeping the skin clean and breathable, away from allergens and the use of drugs and other methods. 1. Folliculitis: the buttocks are not breathable, it may lead to blocked pores, and then easily lead to bacterial infection, causing itchy bumps, folliculitis, it is recommended that the patient to keep the skin clean and breathable, change the underwear, and if necessary, apply erythromycin ointment and other anti-inflammatory treatment. 2. Eczema: the buttocks are not breathable may also lead to excessive perspiration, causing eczema pimples itchy, it is recommended that patients clean the skin after the skin to keep the skin dry, change the underwear, if necessary, the use of glycerite lotion and other anti-itching and anti-inflammatory treatment. It is recommended that once patients find themselves due to the buttocks airtight long pimples itchy later, timely medical treatment, improve the relevant examination after standardized treatment. In addition, drugs may cause side effects symptoms, medication should be used under the guidance of a doctor, do not blindly use drugs.