A study conducted by the Department of Dermatology at the University of Freiburg in Germany reports that using frankincense and five other plant extracts for antimicrobial effects on bacteria and yeast relating to the skin proved effective. The study concluded that their antimicrobial effects were powerful enough to be used as a topical treatment of some skin disorders, including acne and eczema. (19) 
In general, it is recommended that people with acne do not wash affected skin more than twice daily.[15] For people with acne and sensitive skin, a fragrance free moisturizer may be used to reduce irritation. Skin irritation from acne medications typically peaks at two weeks after onset of use and tends to improve with continued use.[15] Cosmetic products that specifically say "non-comedogenic", "oil-free", and "won't clog pores" are recommended.[15]
Acne that’s more inflammatory is denoted as moderate acne. This happens when there are occasional nodules and possibly mild scarring. Severe acne occurs when there are a lot of inflammatory lesions, nodules and possibly scarring. It’s also considered severe if the acne is still present after six months of treatment or if it causes serious psychological issues.
How to Handle It: Pair two of the best-known acne-fighting ingredients, salicylic acid and benzoyl peroxide, in the week leading up to your period. (If you're feeling bloated, now's the time to do it.) The combo can help prevent hormonal acne from happening in the first place. Zeichner suggests following a salicylic acid wash, like fan-favorite Neutrogena Oil-Free Acne Wash Pink Grapefruit Facial Cleanser ($7), with a benzoyl peroxide spot treatment, such as Murad Acne Spot Fast Fix ($22). If you're still seeing zits, "visit your dermatologist to discuss prescription options, like birth control pills, oral spironolactone — which blocks oil — or topical Aczone 7.5 percent gel," says Zeichner. "It's shown to be particularly effective in adult women without causing irritation." Oral contraceptives level out those hormone fluctuations, keeping your oil production normal and your skin clear.

Baby acne almost always goes away on its own with no intervention. But bring it to your pediatrician's attention if the bumps look like they might be infected (for example, skin appears extra red, you notice swelling or discharge, or your child spikes a fever or has other symptoms) or if you suspect an allergic reaction or eczema (which may require a cream to keep the rash from spreading).

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).[10][129] PDT has the most supporting evidence of all light therapies.[78] 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.[140] 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.[8][141][142] 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.[129] The evidence for light therapy as a treatment for acne is weak and inconclusive.[8][143] 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.[10] 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;[144] it may have a role for individuals whose acne has been resistant to topical medications.[10] 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.[145] Typical side effects include skin peeling, temporary reddening of the skin, swelling, and postinflammatory hyperpigmentation.[10]

Simple alcohols like isopropyl alcohol, SD alcohol, and denatured alcohol are everywhere in acne treatment because they trick you into thinking they’re working: Splash some on and any oil on your face instantly vaporizes. However, these ingredients destroy the skin’s barrier, called the acid mantle. When your acid mantle is damaged, you’re actually more susceptible to breakouts, enlarged pores, and inflammation. To make matters worse, evaporating all the oil on your face can actually set your sebaceous glands into overdrive, leaving your skin oilier than ever. If any product included a simple alcohol high up in its ingredients list, we nixed its whole kit.
Coconut oil is all the rage, with uses ranging from hair conditioning to cooking. But some swear by it as a natural acne treatment. To use coconut oil as an acne treatment, you can include it as part of a healthy diet. The fatty acids like lauric acid and caprylic acid are metabolized into antibacterial agents in the body. Or, you can apply a very small amount and rub directly onto your skin after cleansing for an extra hydrating boost.
How to Handle It: Speaking of touching, don't! Picking it, squeezing it, or poking at it will only worsen the situation. These may disappear on their own after a few days. Otherwise, Zeichner suggests visiting your dermatologist for a shot of cortisone, which will reduce inflammation and shrink it in just 24 to 48 hours. But if a last-minute appointment isn't in the cards, play mad scientist. First, ice the area, and then apply salicylic acid gel, benzoyl peroxide gel, and 1 percent hydrocortisone cream. The combo will calm skin, kill bacteria, and draw out excess oil from the pimple — all things necessary to take this down, says Zeichner.
The main hormonal driver of oily sebum production in the skin is dihydrotestosterone.[1] Another androgenic hormone responsible for increased sebaceous gland activity is DHEA-S. Higher amounts of DHEA-S are secreted during adrenarche (a stage of puberty), and this leads to an increase in sebum production. In a sebum-rich skin environment, the naturally occurring and largely commensal skin bacterium C. acnes readily grows and can cause inflammation within and around the follicle due to activation of the innate immune system.[10] C. acnes triggers skin inflammation in acne by increasing the production of several pro-inflammatory chemical signals (such as IL-1α, IL-8, TNF-α, and LTB4); IL-1α is known to be essential to comedo formation.[45]

Combined oral contraceptives. Four combined oral contraceptives are approved by the FDA for acne therapy in women who also wish to use them for contraception. They are products that combine estrogen and progestin (Ortho Tri-Cyclen, Yaz, others). You may not see the benefit of this treatment for a few months, so using other acne medications with it the first few weeks may help.