Second, smoking interferes with the skin's natural defences against free radicals. When free radicals occur, skin breaks down. Smoking also increases the risk of some skin cancers. Some doctors advocate short-term psychotherapy to help alleviate skin symptoms exacerbated by stress. Stress can make many conditions worse, including acne, psoriasis and eczema.
Stress also causes sweating, itching and hives.
Sudden dietary changes. If you're not getting enough fatty acids, your skin can lose luster. People with eating disorders lose proteins and vitamins, which leads to extremely dry skin and other problems. Sunburn and tanning. A sunburn or even a tan indicates your skin has been damaged, and sun damage causes your skin to age before it's time.