Greetings Sir. No food will cause you Rectal Abscess. So now it s time for you to get relaxed and worry free. Since you had repeated attacks of the Abscess, it was operated. So now it s time for you to prevent it from reappearing and maintain the proper Hygiene of that area. Do the following: -Clean the affected area with soap and water. -Then if pain in anus, take a SITZ bath(a warm, shallow bath with salt added that cleanses the space between the rectum and genital region) can be used for everyday personal hygiene & also it provide relief from pain or itching in the genital area. -You can give a sitz bath in your bathtub. & Finally, Approximately 30-50% of people with an anal abscess will develop an anal fistula(an abnormal or surgically made passage between a hollow or tubular organ and the body surface, or between two hollow or tubular organs). Around 80% of all anal fistulas develop from an infection already in the anus. Consult your Doctor if you feel uncomfortable in spite of above measure. Hope it helped you.