S N Cohen’s research while affiliated with British Association of Dermatologists and other places

... Acne onset in prepubescent individuals is increasingly observed, and the persistence of acne into adulthood is unpredictable While most teenagers see resolution of lesions within 3-5 years, some may experience persistent acne for more than a decade. [1][2][3] The development of acne is linked to changes during adolescence, affecting seborrheic areas. Acne lesion formation involves increased sebum production, excessive follicular keratinization, proliferation of P. acnes bacteria, and the development of an inflammatory response. ...

Reference:

Effectiveness and Safety of the Use of 1470 nm Laser Therapy in Patients Suffering From Acne Scarring of the Facial Skin

... The plaques in individuals with intensely pigmented skin are usually gray and may result in marked post-inflammatory hyperpigmentation. Although it can affect any body part, lesions frequently appear on elbows, knees, scalp, intergluteal lines, nerves, and back [93]. ...

Reference:

Shared Pathophysiology of Inflammatory Bowel Disease and Psoriasis: Unraveling the Connection

... Both dry skin and pruritus are also associated with a negative impact on patients' quality of life. 2 When present in more severe degrees, dry skin can lead to erythema, fissuring, or cracking of the skin.1 Moisturizers and ointments, often over-the-counter (OTC) products, have long been a mainstay for the treatment of dry, cracked skin and have been shown to have therapeutic benefits. [3][4][5][6] When recommending an OTC product for patients, it is important for clinicians to understand the ability of the product to support skin hydration. ...

Reference:

An Over-the-Counter Healing Ointment: Benefits in Dry Skin and Wound Healing