Blemishes on your new baby's face aren't necessarily acne, however. Tiny white bumps that are there at birth and disappear within a few weeks are called milia, and they're not related to acne. If the irritation looks more rashy or scaly than pimply, or it appears elsewhere on your baby's body, he may have another condition, such as cradle cap or eczema.
From the What to Expect editorial team and Heidi Murkoff, author of What to Expect the First Year. Health information on this site is based on peer-reviewed medical journals and highly respected health organizations and institutions including ACOG (American College of Obstetricians and Gynecologists), CDC (Centers for Disease Control and Prevention) and AAP (American Academy of Pediatrics), as well as the What to Expect books by Heidi Murkoff.
There are packaged products that contain some combination of the aforementioned ingredients, too. Zeichner likes Clean & Clear’s Acne Triple Clear face wash with salicylic acid in it, but says to sit with it for a bit to let it sink into skin. “Allow salicylic acid to sit on the skin while you sing the alphabet before rinsing, to ensure enough contact time for it to do its job.”
For an overnight solution or something that covers a larger surface area (rather than a smaller spot-treatment), Zeichner also recommends Neutrogena’s rapid-clear leave-on mask. The idea is that you spread benzoyl peroxide all over your face, but it’s not a wash-off mask, so you’re getting a prolonged exposure to the antibacterial peroxide. He says it’s helpful for treating the pimples you have and preventing new ones from popping up.
Shah often recommends over-the-counter retinols or prescription retinoids to her acne-prone patients. “I find that compared to other treatments they are beneficial for not just treating acne but also preventing new acne from forming as they help prevent that initial stage of the follicle getting clogged,” she says. “They can also help with some of the post acne [problems] such as hyperpigmentation.” But keep in mind if you have sensitive skin (or eczema or rosacea), a prescription retinoid might be too strong an option. However, your dermatologist can recommend an over-the-counter retinol with a low concentration (0.1 to 0.25 percent), which might be better tolerated. Retinol also isn’t a quick fix. It takes time to see results, and it’s something you’ll have to keep using to maintain its benefits. Shah also mentions that retinol plays well with other acne treatments on the list. "Retinol can be combined with other over-the-counter or prescription medications such as benzoyl peroxide, topical antibiotics, and oral medications. The right combination depends on the severity of the acne and your skin type."
In women, acne can be improved with the use of any combined birth control pill.[88] These medications contain an estrogen and a progestin.[89] They work by decreasing the production of androgen hormones by the ovaries and by decreasing the free and hence biologically active fractions of androgens, resulting in lowered skin production of sebum and consequently reduced acne severity.[10][90] First-generation progestins such as norethindrone and norgestrel have androgenic properties and can worsen acne.[15] Although oral estrogens can decrease IGF-1 levels in some situations and this might be expected to additionally contribute to improvement in acne symptoms,[91][92] combined birth control pills appear to have no effect on IGF-1 levels in fertile women.[89][93] However, cyproterone acetate-containing birth control pills have been reported to decrease total and free IGF-1 levels.[94] Combinations containing third- or fourth-generation progestins including desogestrel, dienogest, drospirenone, or norgestimate, as well as birth control pills containing cyproterone acetate or chlormadinone acetate, are preferred for women with acne due to their stronger antiandrogenic effects.[95][96][97] Studies have shown a 40 to 70% reduction in acne lesions with combined birth control pills.[90] A 2014 review found that antibiotics by mouth appear to be somewhat more effective than birth control pills at decreasing the number of inflammatory acne lesions at three months.[98] However, the two therapies are approximately equal in efficacy at six months for decreasing the number of inflammatory, non-inflammatory, and total acne lesions.[98] The authors of the analysis suggested that birth control pills may be a preferred first-line acne treatment, over oral antibiotics, in certain women due to similar efficacy at six months and a lack of associated antibiotic resistance.[98]
Complementary therapies have been investigated for treating people with acne.[150] Low-quality evidence suggests topical application of tea tree oil or bee venom may reduce the total number of skin lesions in those with acne.[150] Tea tree oil is thought to be approximately as effective as benzoyl peroxide or salicylic acid, but has been associated with allergic contact dermatitis.[1] Proposed mechanisms for tea tree oil's anti-acne effects include antibacterial action against C. acnes, and anti-inflammatory properties.[65] Numerous other plant-derived therapies have been observed to have positive effects against acne (e.g., basil oil and oligosaccharides from seaweed); however, few studies have been performed, and most have been of lower methodological quality.[151] There is a lack of high-quality evidence for the use of acupuncture, herbal medicine, or cupping therapy for acne.[150]

Frequently used topical retinoids include adapalene, isotretinoin, retinol, tazarotene, and tretinoin.[47] They often cause an initial flare-up of acne and facial flushing, and can cause significant skin irritation. Generally speaking, retinoids increase the skin's sensitivity to sunlight and are therefore recommended for use at night.[1] Tretinoin is the least expensive of the topical retinoids and is the most irritating to the skin, whereas adapalene is the least irritating to the skin but costs significantly more.[1][83] Most formulations of tretinoin cannot be applied at the same time as benzoyl peroxide.[15] Tazarotene is the most effective and expensive topical retinoid, but is not as well-tolerated.[1][83] Retinol is a form of vitamin A that has similar but milder effects, and is used in many over-the-counter moisturizers and other topical products.
C. acnes also provokes skin inflammation by altering the fatty composition of oily sebum.[45] Oxidation of the lipid squalene by C. acnes is of particular importance. Squalene oxidation activates NF-κB (a protein complex) and consequently increases IL-1α levels.[45] Additionally, squalene oxidation leads to increased activity of the 5-lipoxygenase enzyme responsible for conversion of arachidonic acid to leukotriene B4 (LTB4).[45] LTB4 promotes skin inflammation by acting on the peroxisome proliferator-activated receptor alpha (PPARα) protein.[45] PPARα increases activity of activator protein 1 (AP-1) and NF-κB, thereby leading to the recruitment of inflammatory T cells.[45] The inflammatory properties of C. acnes can be further explained by the bacterium's ability to convert sebum triglycerides to pro-inflammatory free fatty acids via secretion of the enzyme lipase.[45] These free fatty acids spur production of cathelicidin, HBD1, and HBD2, thus leading to further inflammation.[45]

If you're looking for suggestions on how to get rid of acne overnight, using toothpaste for acne spot treatment has probably come up. But does it work? Toothpaste contains ingredients like baking soda, alcohol, hydrogen peroxide and menthol that can dry out acne. However, some experts warn that using toothpaste for acne can actually cause over-drying and even skin peeling, so it should be used with caution. Here's how:
This at-home skin peel available at Sephora tightens pores, reduces oil, helps retexturize skin and diminishes dark spots. It's paraben and sulfate free, non-comedogenic and isn't tested on animals. Use this peel each week as part of your clear skin regimen to help even out skin tone and gently remove unhealthy top skin layers, revealing new, healthier skin underneath. 
Acne medications work by reducing oil production, speeding up skin cell turnover, fighting bacterial infection or reducing inflammation — which helps prevent scarring. With most prescription acne drugs, you may not see results for four to eight weeks, and your skin may get worse before it gets better. It can take many months or years for your acne to clear up completely.