Hello,
Causes of itchy anal rash include moisture(due to sweating or frequent washing), the abrasion caused by clothing,the pressure of sitting,chemical irritants like laundry soaps, and scented toilet paper,certain food irritants,medicines,infections like STD’s and pinworms,anal abrasions and fissures and skin problems such as psoriasis, seborrhea and
eczema. Sometimes hemorrhoids will start off as red rash and anal itching.
Treatment of anal itching depends on the cause of the problem.