Back acne occurs when hair follicles become blocked with oil and dead skin cells, leading to bumps on the skin. This condition can be worsened by sweating or wearing tight clothes. The itchiness is often due to irritation caused by the acne. To manage back acne, try using a mild cleanser and avoid wearing tight clothing. Use oil-free lotions and refrain from scratching your skin, this can worsen the condition.

There are many treatment options available to help address your concerns. You can choose from a basic skincare routine to more involved treatments such as laser treatments, chemical peels, light therapy, micro-needling, and laser treatments for acne scarring. These will work by stimulating new collagen in your skin, which can help reduce the appearance of scars. You can look into chemical peels, laser treatments, and light therapies for hyperpigmentation and uneven skin tone. These treatments can help to break down pigmented cells and stimulate new cell growth, which in turn can help reduce the appearance of hyperpigmentation. For dullness, you can look into facial treatments such as microdermabrasion, which can help to exfoliate your skin and reduce dullness. Cost of these treatments can vary widely, depending on the type of treatment you choose. It is best to consult with a dermatologist to get better treatment options.

Looks like your daughter has a skin irritation that is contact dermatitis. One common type is contact dermatitis, which is caused by something rubbing against the skin and triggering redness, itching, and swelling. This thing might be her bra strap or shirt, which is the cause of the rash on her skin when it rubs against it while she is playing basketball, To make her feel better, try to use a soothing lotion or cream and let her put on clothes that are not tight enough to prevent rubbing as much as possible.