Urticaria Skin Allergy all over body.

I got skin allergy with hives all over body before 4 months. For four to five days, I took wysolone 5 mg and zyrtec10mg tablets and applied calosoft lotion as prescribed by doctor. Then I did not get allergy till last month. From september to november, I did not take non veg, egg and spinach as my marriage was fixed. After 20th November,  I took all food. But, since 1 month getting skin allergy again. It is coming when by body heats inside but sense over cooling climate ( I'm IT professional, so while working in A/C office for 8 hours). Mostly in night time in my home too. I went to meet other Doctor. He told the condition is urticaria. So suggested me to eat veg items and drink plenty of water and do exercise in morning. But I took non veg weekly and did not exercise. He prescribed teczine(levocitrizine) while allergy comes. If I take teczine then it is not coming for next few days. I'm having medical condition for depression  and I'm eating voxidep and escigress for last two years.