Acne mechanica

The association between stress and acne among female medical students in Jeddah, Saudi Arabia

“…Many factors have been implicated as aggravators of acne including blood hormone changes and premenstruation, 14 excessive heat and humidity, 11 , 15 – 17 sweating, 1 , 16 , 17 use of makeup and cosmetic products, 11 , 18 , 19 and the use of oily hair products. 1 , 20 Also, the use of topical corticosteroids 21 – 23 and squeezing pimples 24 have been known to increase acne lesions. Excessive heat and humidity was the only significant aggravating factor in our study.…”

Prayer nodules

“…Comedones can be evoked in acne subjects by excessive washing with some soaps-acne detergicans (Mills & Kligman, 1975a)-However, our subjects washed with water only and had no evidence of healed acne. Acne mechanica or the exacerbation of acne due to friction is a well recognized entity (Mills & Kligman, 1975b) but there is no evidence that new cysts or comedor^es are produced; the lesions are caused by rupture of incipient comedones at the site of the pressure.…”

Ultrasound in Sports and Occupational Dermatology

“…7,31 These can also affect athletes, among other types of sports injuries, usually in the skin of the face where helmets contact the skin or any other corporal region exposed to chronic friction. [29][30][31][32][33] Additionally, the presence of chronic trauma or friction can cause the development of inflammatory changes in the skin, the hair follicles, and adjacent tissues. 30,33,34 Ultrasound supports the differential diagnosis of dermatologic lumps 13 ; therefore, it may help assess the diagnosis of a plain callus versus the presence of an underlying pseudocyst.…”

“…[29][30][31][32][33] Additionally, the presence of chronic trauma or friction can cause the development of inflammatory changes in the skin, the hair follicles, and adjacent tissues. 30,33,34 Ultrasound supports the differential diagnosis of dermatologic lumps 13 ; therefore, it may help assess the diagnosis of a plain callus versus the presence of an underlying pseudocyst. Calluses are characterized by focal areas of epidermal thickening, and pseudocysts appear as hypoechoic oval dermal or upper subcutaneous structures.…”

“…This can generate a wide range of adverse reactions that can go from calluses, mild atopic changes, and eczema of the skin to focal sites of folliculitis and mechanical acne 6,7,10,29–31 . For example, these findings can be found in the submandibular, anterior neck, and supraclavicular regions of fiddlers where the violin touches the skin, which has been called “fiddler's neck.” 7,29–31 However, similar alterations have been reported in other types of musicians and locations and have been named “cellist's chest” “guitar nipple,” and the “flutist's chin.” 7,31 These can also affect athletes, among other types of sports injuries, usually in the skin of the face where helmets contact the skin or any other corporal region exposed to chronic friction 29–33 …”