Editing Acne (section)

=== Other ===
Some individuals experience severe intensification of their acne when they are exposed to hot humid climates; this is due to bacteria and fungus thriving in warm, moist environments. This climate-induced acne exacerbation has been termed [[tropical acne]].
Mechanical obstruction of [[skin follicles]] with helmets or chinstraps can worsen pre-existing acne.<ref name="Basak2013">{{cite journal | vauthors = Basak SA, Zaenglein AL | title = Acne and its management | journal = Pediatrics in Review | volume = 34 | issue = 11 | pages = 479–97 | date = November 2013 | pmid = 24187141 | doi = 10.1542/pir.34-11-479 | type = Review }}</ref> However, acne caused by mechanical obstruction is technically not acne vulgaris, but another [[acneiform eruption]] known as [[acne mechanica]].

Several medications can also worsen pre-existing acne; this condition is the [[acne medicamentosa]] form of acne. Examples of such medications include [[Lithium (medication)|lithium]], [[hydantoin]], [[isoniazid]], [[glucocorticoids]], [[iodides]], [[bromides]], and [[testosterone]].<ref name="FitzAtlas"/> When acne medicamentosa is specifically caused by [[anabolic steroids|anabolic–androgenic steroids]] it can simply be referred to as [[steroid acne]].

Genetically susceptible individuals can get acne breakouts as a result of [[polymorphous light eruption]]; a condition triggered by sunlight and artificial UV light exposure. This form of acne is called [[Acne aestivalis]] and is specifically caused by intense [[Ultraviolet#Subtypes|UVA light]] exposure. Affected individuals usually experience seasonal acne breakouts on their upper arms, shoulder girdle, back, and chest. The breakouts typically occur one-to-three days after exposure to intese UVA radiation. Unlike other forms of acne, the condition spares the face; this could possibly be a result of the pathogenesis of polymorphous light eruption, in which areas of the skin that are ''newly'' exposed to intense ultraviolet radiation are affected. Since faces are typically left uncovered at all stages of life, there is little-to-no likelihood for an eruption to appear there. [[Acne aestivalis#Recent Research|Studies show]] that both polymorphous light eruption outbreaks and the acne aestivalis breakout response can be prevented by topical antioxidants combined with the application of a broad spectrum sunscreen.<ref>{{cite journal |last1=Rippke |first1=F. |last2=Wendt |first2=G. |last3=Bohnsack |first3=K. |last4=Dörschner |first4=A. |last5=Stäb |first5=F. |last6=Hölzle |first6=E. |last7=Moll |first7=I. |title=Results of photoprovocation and field studies on the efficacy of a novel topically applied antioxidant in polymorphous light eruption |journal=Journal of Dermatological Treatment |date=1 January 2001 |volume=12 |issue=1 |pages=3–8 |doi=10.1080/095466301750163491 |pmid=12171679 |s2cid=25658207 }}</ref>