One of my friend kick me in the middle of anus and now i am having pain in sitting. please tell me what should i do? is it normal or consult doctor?

Get evaluated: If you want to be sure, pls see a dr. It can be as mild as bruising of the soft tissue, but if in a lot of pain, injury to the sacral spine area can be ruled out by your dr. Start with an anti-inflammatory right now such as Ibuprofen , or try Acetaminophen as pain relievers. Hope u feel better.

GET MEDICAL CONSULT: You may have an injury to the anus, perhaps a fissure or bruise. The coccyx ( tail bone) may have been injured, also. Have a physician check the area.