So it's very sore when I have a bowel movement and also when I pass urine. Its also sore to sit down. At first there was just blood on tissue after I use the toilet but now it seems that I am passing blood rectally. A few days ago I found a blister-like bump on my anus also, as embarressing as this is does anyone know what it is?

You MUST consult a Doctor about this issue AS SOON AS POSSIBLE!!