There are some people who are more prone to develop acne mechanica. The biggest group of people affected by this type of acne are teenagers and young adults in their twenties who already experience issues with acne on their back, shoulders, and buttocks. Other people who have a type of acne commonly described as "sandpaper acne," which is characterized as small but rough acne lesions that are not very visible but feel like sandpaper to the touch, also are more prone to developing acne mechanica. Mechanism
Acne mechanica specifically is triggered by both mechanical and heat stress on the skin working together to cause this irritation. The skin that is exposed to these stressors initially develops a harder surface to protect itself, but if the skin is continually dealing with this pressure, it gets irritated and forms a rash. At this point, it gets qualified as acne mechanica. When you are in a hot climate or are working out and your body temperature rises, the heat causes the pores in your skin to open up. The dilation of the pores makes it easier for bacteria, oil, and dead skin cells to collect in the pores and clog them. Every pore in your body has a tiny hair follicle, and the blockage causes the hair follicle to become irritated and inflamed, which ends up forming pimples; specifically acne mechanica. White blood cells flood the area of inflammation, and once they die, they accumulate on the surface of the pore, causing what is known as a "whitehead".
This is also a reason why mens acne tends to remain a problem for longer once its developed. Acne in general is hereditary from parents to child, so genetics play a factor as well. People who already have acne and have a problematic skin type that tends to create clogged pores are more likely to develop acne mechanica as well. Research Directions
Although not exactly having to do with acne mechanica and the heat or pressure stressors that cause it, there is still not a lot of research relating to different organs health relating to acne appearing on different areas of the body and face. A correlation between the two could be explored in future studies. See also
List of cutaneous conditions


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