Salicylic acid is a topical medication commonly used to treat a variety of skin conditions. It is derived from the chemical salicin found in willow trees, according to North Dakota State University. Depending on the preparation and concentration, it is available by prescription and over the counter. Because of the risk of salicylic-acid poisoning, it should be used exactly as directed and applied only on intact skin, according to the National Institutes of Health.
Uses
Perhaps the best-known use of salicylic acid is to treat acne. But it is also used for a variety of other skin conditions, including psoriasis, warts, corns, calluses and dandruff, according to the National Institutes of Health. When used to remove warts, it should be applied only to the hands and feet. It is not safe to use for genital or facial warts.
How It Works
Salicylic acid is a keratolytic agent. How it works depends on the condition being treated. In treating acne, it reduces inflammation and redness, which in turn unplugs pores and allows blemishes to shrink, according to the National Institutes of Health. In treating thick, hard and dry skin, it softens the skin and speeds exfoliation.
Products
Salicylic acid is available in several forms. Products include soaps, shampoos, wipes, pads, gels, creams, ointments, solutions, lotions, foams and sticks, according to the Mayo Clinic.
Side Effects
Salicylic acid can have side effects. It can cause skin irritation, according to the University of Michigan Health System. It may sting or feel warm when applied. It can also cause the skin to peel.
Salicyclic Acid Poisoning
If these products are not used as directed or are applied too often, users can develop salicylic-acid poisoning. Symptoms of salicylic-acid poisoning include confusion, extreme fatigue and weakness, dizziness, ringing in the ears, hearing loss, rapid breathing, nausea, vomiting and diarrhea, according to the National Institutes of Health.
Precautions
Products containing salicylic acid should not be used with other medicated skin products because of the risk of interaction, according to the Mayo Clinic.Those using topical salicylic acid should avoid using medicated cosmetics, abrasive soaps and cleansers and other topical skin medicines. Additionally, avoid using products that contain a peeling agent in conjunction with salicylic acid.
