Feb 19, 2018 · Heat rash is common especially in hot, humid or tropical climates. Miliaria, also known as sweat/heat rash or prickly heat is a skin condition caused by blocked or inflamed sweat ducts. Search DermNet Ctrl K

Mar 11, 2019 · Some patients with heat urticaria develop generalised wealing if exposed to a hot environment. Heat stimuli can include bathing, hot air, and sun exposure. Cutaneous lesions are limited to areas in contact with the heat stimulus. Delayed heat urticaria. Delayed heat urticaria presents as weals that cause an itch or burning sensation.

Cholinergic urticaria (heat bumps) is characterised by short-lived hives that occur due to sweating. Stimuli that can cause excessive sweating include exercise, spicy food ingestion, and emotional stress.

The type of rash seen in autoimmune progesterone dermatitis can be variable, but the majority of patients present with: Urticaria +/- angioedema and anaphylaxis; Dermatitis. Other reported eruptions include: Non-specific skin changes — morbilliform rash, papules and plaques, vesiculobullous and vesiculopustular lesions, petechiae, and purpura

Miliaria refers to sweat rash (prickly heat) due to obstructed sweat glands and perhaps localised hyperproliferation of specific commensal microorganisms such as strains of Staphylococcus epidermidis. It presents with non-follicular superficial papules, vesicles or …

Intertrigo describes a rash in the flexures, such as behind the ears, in the folds of the neck, under the arms, under a protruding abdomen, in the groin, between the buttocks, in the finger webs, or in the toe spaces. Although intertrigo can affect only …

Typically, the rash is symmetrical, with the volar and dorsal aspects of the feet affected, the toe flexural creases and instep often being spared. Sometimes allergy to particular shoe components dictates the distribution of dermatitis (eg, heel box constituents affect the heel, nickel in zips, buckles, and ski hooks affect the adjacent skin only).

Exercise-induced vasculitis mainly affects one or both lower legs and thighs, with single or multiple episodes of a rash with the following characteristics: Involvement of exposed skin and sparing of skin protected by socks or stockings; Red patches, urticarial lesions (weals) and purpura (purple spots) Oedema (swelling) of the affected leg(s)

Vitamin B2 (riboflavin) deficiency presents with angular cheilitis (cracked corners of the mouth), atrophic glossitis (inflamed tongue) and a rash on the face that resembles seborrhoeic dermatitis. Pellagra is a deficiency of niacin (vitamin B3) and presents with the three ‘d’s: diarrhoea; dementia and dermatitis on sun-exposed areas.

A rash due to photosensitivity is a photodermatosis (plural photodermatoses). If the rash is eczematous, it is a photodermatitis. A chemical or drug that causes photosensitivity is a photosensitiser. A phototoxic reaction to a photosensitiser results in an exaggerated sunburn reaction and no immune reaction is involved.