The outside of my butthole itches really bad all day long :/ and i'm not sure what it is and i'm shy to ask . can you please help me?

Yeast: The most common reason is known among guys as 'jock itch'. This is a fungal dermatitis. And, medication to treat it is readily available at the grocery and drug stores where you live.

Pruritus ani : Most of the time this is an allergy to certain foods such as caffeine, chocolate, cheese, citrus, citric juice, beer, condiments and processed milk. Try to avoid all of these types of food for 6 weeks and add more fiber. After a bowel movement wash with warm water rather than wiping. Keep a dry gauze or cotton ball between the cheeks and change as needed. This will take about 6 weeks.