Answer:
I think the answer is: bipolar disorder
Step-by-step explanation:
Bipolar disorder, is also known as manic depression, is a mental illness that brings severe high and low moods and changes in sleep, energy, thinking, and behavior. People who have bipolar disorder can have periods in which they feel overly happy and energized and other periods of feeling very sad, hopeless, and sluggish.
I bolded the effects of bipolar disorder, it matches with Carlton's case.