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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.
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.
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.
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
The cause of transient acantholytic dermatosis is unknown. Due to the frequent association with skin occlusion, heat, and sweating, one theory suggests Grover disease is due to sweat duct damage and occlusion. Drug-induced transient acantholytic dermatosis may be due to the drug or its metabolites being excreted in the sweat with toxic effects ...
The most frequent rash is non-specific exanthem in which short-lasting red patches appear on trunk and limbs. These areas of erythema clear by themselves and do not require specific treatment. Vesicles and bullae , petechiae (small purple spots due to bleeding into the skin) and urticarial rashes (hive-like) have also been described in association with M. pneumoniae infection.
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 pustules mainly arising on the trunk.
