Welcome to Health Care Magic
You should see an Internist or Endocrinologist
/ get examined / get investigated.
There are several causes that need attention - like Depression
/ Adrenal and so on.
Weight is like bank account. The account grows when you withdraw less (Cut down unnecessary physical work) and you deposit more (eat more). If the weight is picking up, it only means – the exercise is not enough or the food is more. See a good dietician - you have to reduce the quantity of your food and change the quality too. Hit a gym - you need regular exercise.
Wishing speedy recovery