Gurjit ji
Gluttony is a form of lobh or greed. Lobh can mean greed or avarice for money, power, control, influence, and food. Lobh is one of the 5 evils.
But before you or I decide that you are suffering from lobh, gluttony, there are some things to consider.
You said
If eat a lot and are still hungry not to long later
If you are a teenage boy, even a young adult, it is not unusual to be hungry all the time. Your metabolism may be very active at this stage of your life. When we are growing and developing we are simply hungry. With age appetite lessens normally.
Are you extremely active? If an adult male, do you work hard at manual labor such as construction work? Are you athletic, working out or running? You may be burning more calories than the average person and need more to eat.
You say you eat a lot. Do you eat nourishing food that not only satisfies but also repairs your body? Do you get enough protein? Protein satisfies hunger. Do you eat too many sweets? Sweets, and carbohydrates in general, stimulate appetite.
Is your diet balanced? Does it include meat and/or dairy products, vegetables, grains, fruits, in the right percentages?
Are you obese? You may have a medical condition where you eat more calories than you use up. However, certain glands in your body are not sending the signal to your brain that you have had enough. Your brain simply says, "I am hungry."
Are you diabetic? Constant hunger is one of several symptoms of diabetes. It can strike at any age. And diabetes is a silent killer that can cause your physical health to suffer in many ways. You may want to see your doctor for a blood test. Diabetics can be either overweight or extremely thin, depending on the type and stage of diabetes they have.
Before jumping to conclusions, one way or the other about a problem with gluttony, I would definitely explore these questions. You don't have to "fess" up here, because much of this is very personal. Reflecting on these questions quietly and thinking things through can be a private matter and can be helpful.