The University of Maryland Medical Center says omega 3 oils are useful in treating skin disorders. It recommends taking flaxseed oil, a source of omega 3 oils, orally, in capsule or liquid form.
Cure-guide.com suggests a concentrated capsule of fish oil or a tablespoon of cod liver oil as a treatment for acne. Both are sources of omega 3 oils. Either form of oil is taken orally. According to the website, essential fatty acids act lubricate the body. allowing it to rid itself of toxins in skin pores.
Many fish contain omega 3 oils and are a good dietary source of essential fatty acids. Some species, however--including swordfish, mackerel and shark--can contain high levels of mercury. Pregnant and nursing women, and children, should limit their intake of these foods.
Omega 3 dietary supplements are sold commercially. Make sure the oils are prepared by a quality lab and certified mercury free.
Omega 3 Oils and Hormone Related Acne
In his book book "Alternative Cures," Bill Gottlieb suggests a prepared fatty oil supplement, which he says impacts hormonal balance, as an acne treatment for women who have breakouts related to their menstrual cycle.