Why do i feel so stuffed after eating so little. ?

Enzymes: Even the thought of eating starts the release of digestive juices (enzymes). Stretching the stomach with food starts enzymes in the small bowel that cause fullness. This is usually a good thing and prevents over-eating. What amount is "eating so little?".

May have: And ulcer in your stomach or swelling from inflammation or a tumor that limits gastric emptying and gives you early satiety, the feeling of fullness after very little food. Please see a gastroenterologis.