You should go to a doctor. You might have an infection or illness or a wound etc.
Haematochezia
rectal bleeding can be a complication of diverticular disease.
my anus is bleeding
You go to the emergency room.
You eat too much spicy curry
If you tear the anus, you could have bleeding, itching, and burning pain. You also risk serious infections.
It all depends where the bleeding occurs. If the bleeding is in the stomach or small intestine, the blood will likely be clotted by the time it reaches the anus, and that will make the feces dark in color and tarry in consistency.If the bleeding is in the rectum or anus, then you will see fresh blood on what is otherwise normal feces.
Deworming should not cause bleeding-period. If your kitten is passing blood, you need to take him to the veterinarian for an exam.
You should always be concerned with any bleeding from anywhere. We are not supposed to bleed. If the blood is deep red it might be serious and you should see a doctor. If it is light red, and if your anus is itchy then it might be piles - haemorrhoids, and you should consult a pharmacist/chemist.
Bleeding from the anus can be caused by a couple of things. The first is hemorrhoids. Hemorrhoids are inflamed, irritated blood vessels in the rectum. Sometimes they can bleed when you have a bowel movement. This is not anything to worry about, unless the bleeding is severe, or does not stop. Another reason blood could come from the anus would be some sort of internal bleeding. Intestinal polyps or stomach ulcers can bleed into the intestines and be passed through the anus. This can be a potentially serious condition, since the body is slowly losing an unknown amount of blood. If you are unsure of the origin of the bleeding, please see your doctor for proper diagnosis and treatment.
Seek medical assistance is the easy answer.