A Lump Outside the Anus: If you notice a lump outside of your anus, it’s something you should monitor. If that lump begins to increase in size, chances are it’s a tumor. Usually, if the lump increases in size, the pain will soon follow because the tumor is growing.
Unusual Bowel Movements: This sign of anal cancer is very common with other diseases and infections. But if you do experience unusual bowel movements, it’s something that should be noted and monitored. If you find that you’re going too much, or too little, your doctor will need to know all of this information.