For a few months now, my mouth, throat and gums becometingly and lips start tching after eating fruits with skin and nuts. it has never happened before. why is it happening now?

Allergies?: Could be an oral allergy syndrome. See your physician and consider seeing an allergist.

Allergy: You likely have an allergy to those particular fruits and nuts. It is common to never have an allergy to something before and it can "all of a sudden" occur. Definitely refrain from eating those particular fruit and nuts. You should seek an allergist who can formally skin test you and make recommendations.

Allergy: That could be due to an allergy need to check what fruis causes that check with an allergist.