I don't feel hunger why ?

Depends : Could be an issue with ur stomach, like gastritis or ulcer-usually come with pain, but not always. May be just avoiding foods. Other aspects are hormonal imbalances, like thyroid. Not sure if u smoke, but cigarettes, and caffeine also, will lower the appetite too. Stress is a huge part in this equation too. Most don't feel hungry when stress is prominent. It could be lot of work to poor sleep, etc