1. state: The normal anus is in a closed state regardless of the patient's left lateral position, knee-chest position or lithotomy position. Gently pull the flap or tissue around the anus to keep the anus closed, indicating that the anal closure function is normal. If the anus is pulled open, it is called anal turbulence, which means that anal dysfunction or anal sphincter damage, long-term prolapse and other diseases may occur anal turbulence;
2. Color: The skin around the normal anus is dark red or purple brown, which is caused by more melanocytes in the skin;
3, hair: there is hair tissue on the anal skin called anal hair, which is a normal physiological phenomenon;
4, wrinkles: the appearance of the anus will have radial wrinkles, which is normal, because the combined wrinkles from the rectum and anus will pull the skin;
5, disease symptoms: the anus will not appear obvious uplift, there will be no redness, swelling, pain and other inflammation, and there will be no ulcer crack. Skin will not have the characteristics of skin diseases such as depigmentation, pigmentation or lichen-like changes and scratches. , and will not grow a raised soft tissue lump;
6. Anal digital diagnosis: When conducting anal digital diagnosis, the anus has a certain tension, which will cause a blocking feeling to the fingers, indicating that the anus is normal. When the finger enters the anus, it will not touch the obvious lump, especially the middle and lower part of the rectum, and it will not touch the crisp, bleeding and cauliflower-like tumor. If you have a similar tumor, you should go to a regular anorectal hospital to find a specialist for examination and treatment.