It is depend upon your figure requirement. What type of figure you want? But if you want to lose weight then one thing remember every time don't use medicine and dieting because it can be dangerous. Use most of natural products fruits & mineral products and based on exercise also.
I think gym is better than a home exercise because at home we do not follow daily workout so that our fitness effect with it and a gym is a place where we will go for only and only for exercise.
It will be harmful to your skin and I personaly advice to consult a skin specialist so that prevent this provent this problem, please do'nt ignore it and go for doctor as soon as possible.