Researchers found sedentary behavior is linked to thinning in regions of the brain that are critical to memory formation. Sitting too much is linked to changes in a section of the brain that is critical for memory, according to a preliminary study by UCLA researchers of middle-aged and older adults.
Bulimia is an eating disorder in which someone forces vomiting in order to lose weight.
Therefore, I believe the answer would be throwing up after meals, as well as his teeth being discolored and his cheeks being swollen as a result of his bulimia.