The third phase of the life cycle of acne is inflammation. At this point, your body’s immune system may deal with the problem, but if it doesn’t, different bacteria can move into the pore. Detecting an enemy bacterial invader, your body responds by emitting white blood cells to the infected area. In some cases, the white blood cells have a difficult time fighting the bacteria, and some die, contributing to the oily buildup and creating pus.
Light therapy is a treatment method that involves delivering certain specific wavelengths of light to an area of skin affected by acne. Both regular and laser light have been used. When regular light is used immediately following the application of a sensitizing substance to the skin such as aminolevulinic acid or methyl aminolevulinate, the treatment is referred to as photodynamic therapy (PDT). PDT has the most supporting evidence of all light therapies. Many different types of nonablative lasers (i.e., lasers that do not vaporize the top layer of the skin but rather induce a physiologic response in the skin from the light) have been used to treat acne, including those that use infrared wavelengths of light. Ablative lasers (such as CO2 and fractional types) have also been used to treat active acne and its scars. When ablative lasers are used, the treatment is often referred to as laser resurfacing because, as mentioned previously, the entire upper layers of the skin are vaporized. Ablative lasers are associated with higher rates of adverse effects compared with nonablative lasers, with examples being postinflammatory hyperpigmentation, persistent facial redness, and persistent pain. Physiologically, certain wavelengths of light, used with or without accompanying topical chemicals, are thought to kill bacteria and decrease the size and activity of the glands that produce sebum. As of 2012, evidence for various light therapies was insufficient to recommend them for routine use. Disadvantages of light therapy can include its cost, the need for multiple visits, time required to complete the procedure(s), and pain associated with some of the treatment modalities. Various light therapies appear to provide a short-term benefit, but data for long-term outcomes, and for outcomes in those with severe acne, are sparse; it may have a role for individuals whose acne has been resistant to topical medications. A 2016 meta-analysis was unable to conclude whether light therapies were more beneficial than placebo or no treatment, nor how long potential benefits lasted. Typical side effects include skin peeling, temporary reddening of the skin, swelling, and postinflammatory hyperpigmentation.
Antibiotics for acne, both topical and oral, used to be the top prescriptions for getting clear skin, but research has revealed that they aren’t the best option for most people today due to something called antibacterial resistance. This is where bacteria mutate, become immune to certain antibiotics, then reproduce offspring that are also immune, creating entire colonies of bacteria that can’t be killed by certain antibiotics.
Acne treatment that you apply to the skin: Most acne treatments are applied to the skin. Your dermatologist may call this topical treatment. There are many topical acne treatments. Some topicals help kill the bacteria. Others work on reducing the oil. The topical medicine may contain a retinoid, prescription-strength benzoyl peroxide, antibiotic, or even salicylic acid. Your dermatologist will determine what you need.