Hi there. I have had a lump on my anus for about 2 weeks now. I dont notice it during the day, its only when I wipe I can feel a lump and a slight pain when I touch it. Its about the size of half a grape and is a blueish colour. It usually itches after I have been for a No 2. I haven't noticed any blood but usually after walking round for a day I notice a damp patch on my underwear and around my anus is like a mucousy type stuff. What could this be?