Question: Why do I have an itchy mouth, throat, ears, lips after eating some fruits.
You probably might be experiencing a condition called "Oral Allergy Syndrome. In this condition, people experience itchy mouth / throat / ears or even a bit swellen and itchy lips. You should visit an allergist to confirm your allergic condition and get medications if required.
Before going to a physician, you can try to understand more about the causes of this allergic condition. Usually it is related to your sensitivity to some pollens contained in the fruit. You can try eating the fruit cooked to see if it still causes the allergic reaction. You can also try consuming the fruit peeled. If you are used to allergic medicines (antihistamine), try it before having the allergic food to confirm your allergy to the food. Its always strongly recommended to visit a physician or to avoid the allergy causing fruit.
Common fruits that cause this syndrome include apple, peaches, fig, potatos, hazel nuts and it can range to any fruits and nuts.
If you didn't have this sensitivity from birth, it might go away in course of time. If the reaction was one time, a probable reason could have been insecticides.
Homeopathy has some good treatments for allergic reactions and conditions.
Some nice articles that tells about Oral Allergy is as follows:
Wikipedia
WebMD.com