Causes of Acne The summer period, heat, and excessive exposure to ultraviolet rays can activate metabolic processes in the body. Excessive tanning can cause inflammation, excessive keratinization of the skin, and increased sebum production, leading to the appearance of acne. It is important to remember that rashes on the body can manifest as pimples, cysts, or inflamed bumps. However, sometimes it may not be acne, for example, folliculitis — an infection of the hair follicles caused by the accumulation of sweat and dirt. Therefore, it is recommended to consult a dermatologist for an accurate diagnosis. Acne on the back and shoulders occurs due to the accumulation of dead skin cells and sebum in the pores, as well as due to the excessive growth of Cutibacterium acnes bacteria, which causes inflammation. Such rashes usually appear during puberty, most often in men. The main affected areas are the upper and lower back, as well as the shoulders. People with oily skin or hormonal disorders, such as polycystic ovary syndrome, are more prone to this type of acne. Aesthetic cosmetologists explain why acne appears on the back and shoulders: Ultraviolet Rays After summer, many notice rashes on their back and shoulders, which may be accompanied by itching and discomfort. This is often related to a reaction to ultraviolet light. Dermatologists call this photodermatitis, which occurs more frequently in people prone to sun allergies or those who have spent a long time in the sun without SPF protection. Improper Nutrition Skin problems can arise from improper nutrition, especially in the summer when many consume a lot of delicacies, spices, and alcohol. This can negatively affect stomach function and, consequently, skin condition. Increased Sweating High heat activates the sebaceous glands, which can also lead to inflammation on the body. This can also occur with hormonal imbalances. Improper Care In summer, many continue to use cosmetics that clog pores and dehydrate the skin, contributing to the appearance of acne. It is important to choose natural creams and gels that allow the skin to "breathe."    Ways to Combat Acne on the Back and Shoulders 1. Do not squeeze or pick at acne, as this can lead to the proliferation of bacteria and worsen the situation, increasing the risk of dark spots and scars. 2. If you have folliculitis, friction against the skin will only exacerbate the problem. Tight clothing can also contribute to inflammation. 3. Take a shower immediately after exercising, as heat and humidity promote bacterial growth. Pay attention to the composition of your shampoo and conditioner, as they can cause acne. 4. Gradually increase your sun exposure time to allow your skin to adapt to UV rays. In summer, it is beneficial to use thermal water with selenium to protect the skin. 5. Wash your clothes after each workout to remove sweat and dirt that can irritate the skin. 6. Avoid drying facial cleansers. Use special cosmetic wipes to remove excess sweat and oil.    7. Scrubbing the skin can worsen the problem. Use gentle skincare products without fragrances. 8. Change or wash your sheets once or twice a week to remove bacteria and dead skin cells. 9. For hormonal acne, change your diet to include walnuts, seafood, and leafy greens, and avoid high-sugar foods. 10. Include probiotics in your diet and skincare routine to improve the microbiome. 11. Use products with benzoyl peroxide, salicylic acid, or glycolic acid to combat acne, but give them time to work.