Hi. Thanks for asking in Healthcare Magic. External piles when thrombosed results in severe pain and swelling. Constipation and straining during stools increases the intra abdominal pressure and worsens it. Several nutritional factors are claimed to prevent piles by preventing constipation. Some of them are. -A rich fiber diet. -Banana either whole or boiled. -papaya, cabbage and colcasia. -radish juice. -roasted and powdered seeds of cumin. -carrot and beet root juice. -plenty of cooked onions or onion juice. - crushed leaves of bitter gourd. -decoction of neem leaves and flowers. Application of olive oil on the inflamed area will relieve pain. Sitting on warm water mixed with baking soda will help to relieve the pain due to inflammation. Anesthetic steroid piles ointment available over the counter is helpful. I hope this is useful to you.