I think this would be considered drug therapy treatment. Not 100% sure though.
it may be a medical problem but you yourself said you have poor eating habits and the can 100% cause weight gain. A burger fry and a drink is about your supposed daily intake. Eat right see if it help's otherwise go into a family/general/internist doc and get some test done.
A diet based on the types of foods presumed to have been eaten by early humans, consisting chiefly of meat, fish, vegetables, and fruit, and excluding dairy or grain products and processed food.
(This is what I found on the internet)
Answer:
manubrium, body, and xiphoid process.