Why do I get hungry 1-2hours later after eating a meal? I'm a 19yr old female. Petite. 143lbs, 68inches tall.

Short . Short answer is that you likely have a high metabolism and thats why you get hungry so fast. There are other factors involved. If you eat fruits and veggies those are digested faster and you get hungry quicker. However if you eat pasta, that tends to be filling for longer periods of time. Also protein fills you up faster. You should also have a yearly history and physical with your doctor, so other factors that may be related to this issue can be uncovered. Good luck.