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Miliaria rubra, the most common form of heat rash, results in red, 2–4 mm, non- follicular papules and papulovesicles. They are very itchy. Background erythema is often present. In children, miliaria involves the trunk and the skin folds of the neck, axilla or groin. In adults, miliaria often affects the upper trunk, scalp, neck and flexures ...
Heat urticaria is a rare type of physical or chronic inducible urticaria. It is also called contact heat urticaria and localised heat urticaria. Heat urticaria occurs following the direct contact of a warm stimulus to the skin. The onset of urticaria is typically rapid (within minutes) and the urticaria resolves within 1–2 hours.
Cholinergic urticaria. Cholinergic urticaria is a type of chronic inducible urticaria caused by heat, emotional stress and exercise. The mechanism is uncertain as wealing may occur without sweating. It usually presents with numerous pruritic 2–3 mm weals surrounded by a red flare, which persist for 15–30 minutes and are at least sometimes ...
Thermal burns. Due to contact with ovens, grills, deep fryers and other sources of heat, thermal burns are frequent among chefs and restaurant workers. These burns result in pain, redness, swelling, blistering and when severe, loss of epidermis or dermis. Thermal burns also put workers at risk for secondary bacterial infections.
Exercise-induced vasculitis is a harmless form of cutaneous small vessel vasculitis. It is also called golfer's vasculitis. It is a neutrophilic inflammatory disorder involving the small or medium-sized blood vessels of the skin and subcutaneous tissue. When only the small capillary vessels are involved, it is also called exercise-induced ...
Cholinergic urticaria is a common chronic inducible urticaria that is characterised by the presence of short-lived transient hives (itchy bumps) due to stimuli that induce sweating. It typically presents with small, raised 1–4 mm wheals which last for 15–30 minutes. It is also sometimes referred to as cholinergic angioedema urticaria or ...
Intertrigo is due to genetic and environmental factors. Flexural skin has a relatively high surface temperature. Moisture from insensible water loss and sweating cannot evaporate due to occlusion. Friction from the movement of adjacent skin results in chafing. Intertrigo occurs more easily in environments that are hot and humid.
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
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.
Localised itchy skin without rash. May have secondary lesions due to scratching: erosions, purpura, lichen simplex and secondary infection. Localised itch is often neuropathic / neurogenic. If scalp itchy, look carefully for head lice and their egg cases. Brachioradial pruritus — arm.
