There's a pimple on my asshole. It doesn't hurt. What's going on?

Anal mouth long flesh pimple painless, may be the following reasons: 1. Hemorrhoids: internal hemorrhoids or mixed hemorrhoids usually no obvious pain, only in hemorrhoids prolapse or thrombosis will appear pain. 2. Anal papilloma: anal nipple due to feces and chronic inflammation of the long-term stimulation increased hardening, is one of the common benign tumors of the anus and rectum. 3. Rectal polyps: Rectal prolapse: refers to the anal canal, rectal mucosa or rectum, part of the sigmoid colon downward displacement, prolapse outside the anus of a disease, early stool after mucosal prolapse from the anus, and can retract on its own; In the later stage, the prolapsed object cannot retract by itself and needs to be restored with a hand support. It is often accompanied by a feeling of incomplete defecation and falling. 5. Tumor: Acute suppurative infection occurs in the soft tissue around the anal canal and rectum or in the surrounding space, and an abscess forms. It is called an abscess around the anal canal or rectum. It is characterized by spontaneous ulceration or anal fistula often formed after surgical incision and drainage. If the abscess delays the early surgical treatment, it can form anal fistula and bring great pain to the patient. The above content is for reference only. If you find that the anal mouth has grown flesh lumps, it is recommended to seek medical attention in time for a clear diagnosis and treatment.