Im 18 male and i tryed anal masturbation for the first time. I used a standard size sharpie and hand lotion. I had to stop because i noticed some blood on the sharpie and some blood when i wiped. Later I had small amount of abdominal pain I went to sleep and the next day i had a BM and it was black and tarry. Then i had a bad diarrhea and it was normal color and now i have abdominal pain like a crampy feeling. What is wrong? Did i Puncture something like my colon? or what? I need help and i need an answer asap please im worried what should I do?
Go to a doctor, this could be serious. For what I know black faeces means that yours gastrointestinal are bleeding and it's something U cannot ignore.