Skin rash. red streaks. Go permanently.

Around a month back I had unknowingly consumed an expired green tea early morg in empty stomach for a few days immediately I got this allergy of red lines on my hands feet bck neck thighs etc... from then on it gets triggered when I eat non veg even chapati and other not able to tel exactly...and it's more than a month Nw tat this allergy keeps recurring and it's very uncomfortable m unable to eat my normal food fearing wher it wud occur again..I visited a doc he suggested I eat plain food no non veg for a month and take montek L.c tablet at nyt times..it seems not to appear if I take dis tablet...but I can't continue dis tab for more than a month...pls suggest what can be done...m sure green tea has caused this to me...pls advice.how much time will it take to cure...will it leave me and go permanently...I