Hi, and thanks for your medical question on eHealth forum!
Yes, hemorrhoid is not a contraindication for foreign travel. There are hemorrhoidal creams available in the market (over the counter) which you can apply. Sit in a tub of warm water for 10 mins at least twice a day. Increase fiber in your diet.
Eat lots of fresh fruits, vegetables, oats, porridge etc. Good sources of fiber are fruits, vegetables, and whole grains. Consult a doctor in your country. Hope this helps. Take care!