Are you having any other associated symptoms of pain, bleeding, itching, mucoid discharge, etc?
This could be an anal skin tag secondary to anal fissures, hemorrhoids, warts due to human papillloma virus, moles, or in rare cases due to rectal cancer.
'An anal fissure is an unnatural crack or tear in the anus skin. As a fissure, these tiny tears may show as bright red rectal bleeding and cause severe periodic pain after defecation.'
'Symptoms of external hemorrhoids may include painful swelling or a hard lump around the anus that results when a blood clot forms. This condition is known as a thrombosed external hemorrhoid.
In addition, excessive straining, rubbing, or cleaning around the anus may cause irritation with bleeding and/or itching, which may produce a vicious cycle of symptoms. Draining mucus may also cause itching.'
It would be best to consult a surgeon for your symptoms to find out the cause of your complaints.
Till then you could try eating a high-fiber diet, using stool softener, taking pain killer and having a sitz bath for your symptoms. Apply calamine lotion at the site, keep the area clean and well moisturized, wear lose, comfortable clothes and maintain good personal hygiene.
Let us know if you need any other information. Post us about how you are doing.