Photomedicine

Common Skin Conditions

Seborrheic dermatitis (SD) is a form of eczema and a common, inflammatory skin disorder that affects infants and adults and is usually associated with seborrhea (increased sebum production). It is characterized by reddish or pink patches of skin, accompanied by greasy, yellowish flakes or scales.

 

Rosacea is a very common, chronic disease of the skin where facial veins become highly reactive. It is often characterised by frequent or persistent flushing in the central area of the face, swelling and/or acne like appearance. Erythema can also occur in peripheral areas such as the neck and chest. Telangiectasias, or the development of small punctual bleeding areas of the skin, can also contribute to the redness due to dilated or broken capillaries.

 

Psoriasis is a chronic, inflammatory condition of the skin in which both genetic and environmental factors are thought to be an influence. There are five clinical subtypes, each with unique signs and symptoms, but is generally characterized by thick, red skin with overlying silver-white patches called scales, referred to as psoriatic plaques. The scaly patches are caused by excessive skin production and the accumulation of skin leads to the silvery-white appearance.

 

Acne vulgaris, commonly referred to as acne, is a skin condition characterised by whiteheads, blackheads and inflamed red pimples. It is a very common skin condition in adolescents and affects a significant minority of adults. Acne can severely impact an individual’s psychological well-being, as acne can lead to scarring. Although not a systemic disease (i.e. acne is usually confined to the skin and does not affect other tissues or organs), a rare and systemic form of acne, acne fulminans, can affect bones and other tissues.

 

Atopic dermatitis (AD), also known as atopic eczema, is one of the most common chronic inflammatory skin diseases. It is characterised by itchiness (pruritis) and associated defects in the skin barrier. AD is a complex disease with significant genetic and environmental influences, but its precise mechanisms are poorly understood.