The main reason for having a white one by one anus is eczema or folliculitis. 1. some of the most common causes are eczema, the main reason for eczema symptoms is the long-term humidity around the anus and the imbalance of their own endocrine function, in addition to itching, redness, odor and other problems. 2. folliculitis can also cause a white particle to appear around the anus, folliculitis is triggered mainly because of The reason for this is that the anus is not hygienic for a long time and the bacteria are not cleaned up for a long time, which causes the bacteria to enter the hair follicles, and allergies can also cause the anus to have a white one by one. The actual fact is that you can’t get a lot of people to do this.