You may be siffering from haemorrhoids which would give you the symptoms you describe. They are slightly enlarged veins in the anal passage, which respond to an over-the-counter preparation - ask your chemist for advice. Chemists receive this type of inquiry all the time, there is no need to feel inhibited, but if you are shy, a quick phone call may give you the information you need. Otherwise, you may have a local bacteria infection which can be cured quickly with a prescription. Have a word with your GP, there's no need to be embarrassed, your complaint is far more common than you think, and nothing to be ashamed of. Your doctor can cure your condition, and assure you there is nothing more serious involved.