During puberty, you may notice your hair and skin becoming more oily.

take a break move to stretching and slowly work back into physically exercising if the problem continues go to a doctor or physical therapist

starvation is bad because your body needs nutrition and to deprive it of nutrition can cause problems with both health and fitness.

explanation:

it can make weight loss slow down over time, but it won't cause someone to gain weight depsite restricting calories. starvation causes weakness in the senses like thirst.