The skin is the largest organ of the body and has three main layers - the epidermis, dermis and hypodermis. The epidermis is the top layer we see and contains melanin, which provides protection from the sun's rays. Below the epidermis is the dermis, which carries heat and nutrients and contains hair follicles and sweat glands. Issues like blackheads, whiteheads and pimples can occur if pores in the skin become clogged. Regular hygiene and avoiding squeezing pimples can help address these. Skin conditions vary from things like athlete's foot or ringworm caused by bacteria or fungi, to moles, cysts and rashes that may require medical attention.