P. acnes also provokes skin inflammation by altering the fatty composition of oily sebum.[44] Oxidation of the lipid squalene by P. acnes is of particular importance. Squalene oxidation activates NF-κB (a protein complex) and consequently increases IL-1α levels.[44] Additionally, squalene oxidation leads to increased activity of the 5-lipoxygenase enzyme responsible for conversion of arachidonic acid to leukotriene B4 (LTB4).[44] LTB4 promotes skin inflammation by acting on the peroxisome proliferator-activated receptor alpha (PPARα) protein.[44] PPARα increases activity of activator protein 1 (AP-1) and NF-κB, thereby leading to the recruitment of inflammatory T cells.[44] The inflammatory properties of P. 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.[44] These free fatty acids spur production of cathelicidin, HBD1, and HBD2, thus leading to further inflammation.[44]
One of the best face washes for sensitive skin, this soap-free, fragrance-free, non-comedogenic cleanser works to remove excess oil from your skin without irritation. It’s great for oily and combination skin types, as it cleans and purifies without making the skin taut and dry. Its formula is glycerin-based for a gentle cleanser that won’t provoke even the most sensitive of skin types.
To properly use sunscreen, you should put it on about 30 minutes before you plan to go outside. You will also need to reapply it if you sweat a lot. Be generous when you put it on and consider looking for a lip balm sunscreen specially made to protect your lips. Finally, make sure you are drinking enough fluid, so you don’t dehydrate your skin while outside.

Hormonal treatments for acne such as combined birth control pills and antiandrogens may be considered a first-line therapy for acne under a number of circumstances, including when contraception is desired, when known or suspected hyperandrogenism is present, when acne occurs in adulthood, when acne flares premenstrually, and when symptoms of significant sebum production (seborrhea) are co-present.[128] Hormone therapy is effective for acne even in women with normal androgen levels.[128]
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