There is a soft mass on the anus, depending on the cause of formation and other symptoms there are several cases: first, internal hemorrhoids prolapse, is also the most common symptom of anal masses, such soft masses can return to the anus by themselves or need to be returned to the anus by hand, serious cases may appear embedded causing ischemic necrosis, may be accompanied by pain, bleeding, anal itching, foreign body sensation, etc.; second, external hemorrhoids, the main The main feature is that they do not return to the anus, but always exist outside the anus, which can be painful or bleeding, and can be large when they are soft in nature; third, anal superfluous organisms, such as anal skin bridges due to repeated attacks of hemorrhoids or even infections that cause the skin bridges to grow and protrude more, which can form swollen and soft masses when they are inflamed and swollen; fourth, perianal abscess, because the skin tissue around the anus is weak, so the abscess around the anus The skin around the anus is weak, so the abscess around the anus is easy to break out from the skin of the anus, and when the inflammation attacks, it can form a swollen mass, which will become soft when there is pus.