Why could i be hungry all the time even after getting full on a meal an hour later feel like i'm starving ?

Hungry all the time: Maybe just hungry, but "stomach pain" can be caused by lots of things & may originate outside GI tract. Further evaluation is in order before anyone can answer "what to do." Your doctor will want to know the quality, timing, duration, location, & associations (eating, position, activity, stooling, urinating, stress) of your "hunger pain" to better direct the next appropriate test & for treatment.