Major culprits are acidy foods such as cranberry, cola, and coffee. Alcohol and spicy foods are also irritating to the prostate.
Dr. Krisiloff has treated 1,710 men with chronic prostatitis. The treatment was simple and inexpensive and based on the theory that chronic prostatitis is an allergic inflammatory reaction to caffeine, alcohol, and hot spices. [The Krisiloff Diet: A Simple Dietary Cure for Prostatitis]
You may find that alcohol, coffee, tea and spicy foods make pruritus ani worse. These foods irritate the digestive tract and increase the number of stools or amount of mucus secreted from the rectum.
Other items that can irritate include chocolate, citrus fruits, vitamin C tablets and tomatoes. Once a person eats or drinks something that can irritate the anus, it usually takes 24 to 36 hours before anal itching begins.
Spicy and acidic foods may affect your bladder and cause irritation, resulting in increased urgency . Carbonated beverages, citrus juices and fruits, tomatoes and tomato-based products, and chocolate may also contribute to this problem.