Hello beaversinluv, Hive ( urticaria ) outbreaks affecting the upper lip and eye must be taken seriously because, they could part of allergy called anaphylaxis. You must be happy that it responds to the anti histamine you have adminstered. The causes could be inside the body or coming from outside the body. Outside the body Through mouth 1. Artificially coloured or flavoured food or diet like nuts, This will vary from child to child 2. Drugs The list is long. All antibiotics and anti inflammatory drugs Through the skin 3. Dust 4. Playing near plants 5 . Dress we use 6. Insect bites 7. Chemicals used for bathing and washing 8. Water used for bathing and washing Inside the body 9. Cavities in the teeth 10. Urinary tract infection 11. Worms in the gut 12. Many problems of the blood. What to do? If problem persists to do basic allergy tests in the blood and a urine examination and proceed. For things outside the body, the control is in your hands with regards arulalan