Anagen Effluvium
Anagen effluvium is a non-scarring hair loss that occurs when the growth phase (anagen) is disrupted. It is reversible, with hair regrowing 3-6 months after the cause is stopped.
Telogen Effluvium
Telogen effluvium is a non-scarring hair loss characterised by a greater proportion of hairs that are in telogen. It commonly occurs after periods of stress (childbirth, blood loss, high fevers and major bone fractures). Hair loss is noted during the…
Actinic Keratosis
Actinic keratosis is a dysplastic epidermal lesion that is caused by chronic UV radiation exposure. They appear as rough, scaly patches or papules on sun-exposed skin. They are often the precursor to cutaneous squamous cell carcinoma (cSCC).
Cellulitis
Cellulitis is defined as a bacterial infection of the dermis and subcutaneous tissue. It is often caused by a break in the skin, which allows bacteria to enter. It commonly affects the legs and face, though it can infect any…
Folliculitis
Folliculitis is a common infection that is defined as inflammation of the hair follicles. It can be due to infections (bacterial or fungal), inflammation, or blockage of the pores. Most cases are superficial. Deeper cases of folliculitis are harder to…
Impetigo
Impetigo is a highly infectious superficial skin infection caused by Staphylococcus aureus and Streptococcus pyogenes. A skin defect usually precedes infection, and this can be in the form of a scratch or abrasion, or a skin condition such as eczema.…
Erythema Nodosum
Erythema nodosum is an inflammation of subcutaneous fat that presents as tender, erythematous, nodular lesions. It commonly occurs over the shins, but may occur elswhere e.g., forearms and thighs. It is self-limiting, usually resolving within 6 weeks. The lesions heal…
Eczema Herpeticum
Eczema herpeticum is a serious, widespread herpes simplex virus (HSV 1 or HSV 2) infection. It affects patients with atopic dermatitis or other skin conditions. In children, it typically presents as an eruption of punched-out ulcers commonly affecting sites of…
Rosacea (Acne Rosacea)
Rosacea is a common facial rash. It is characterised by sterile inflammatory papules, pustules, and nodules that may sometimes be mistaken for acne vulgaris, but do not cause comedones. It is associated with the mite Demodex folliculorum, which is a…
Vitiligo
Vitiligo is an autoimmune condition that is characterised by depigmentation of the skin due to loss of melanocytes. It affects 1% of the population. The peak incidence is 20 – 30 years. It affects men and women almost equally.