Causes of skin discomfort between the buttock cheeks include moisture(due to sweating or frequent washing), the abrasion caused by clothing, the pressure of sitting, chemical irritants like laundry soaps, colognes and scented toilet paper, anal abrasions and fissures and skin problems such as psoriasis, seborrhea and eczema.
Try an over-the-counter (OTC) cream or ointment containing hydrocortisone (Cortaid, Preparation H),but it is to be applied sparingly to the affected area. A protective ointment that contains zinc oxide (Desitin, Balmex) also may help.
If the symptoms are severe then please get it evaluated from a dermatologist.
I hope it helps. Take care and regards.
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