Anabolic androgenic steroids mimic the hormone testosterone, which stimulates the skin's oil glands. This leads to outbreaks of pimples on the face and body. Abusing steroids can cause baldness in males and facial hair and baldness in females.
Not a Good Look
Heavy methamphetamine users can develop acne, dull skin, and self-inflicted wounds caused by picking at their faces and bodies to relieve the feeling of insects crawling under their skin. Because methamphetamine use also decreases appetite by interrupting the brain's normal hunger response, users can become very thin and develop a skeletal appearance.
Wrinkles Nicotine in cigarettes causes blood vessels at the skin's surface to narrow, reducing blood flow and depriving the skin of important nutrients and oxygen.
Chemicals in cigarettes cause skin to sag by damaging collagen and elastin, proteins important for smooth, young-looking skin.