Heat rash (Miliaria): Images, Causes, and Treatment - DermNet
2018年2月19日 · 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 - DermNet
2019年3月11日 · 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 - DermNet
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: Causes, Treatment, and Images - DermNet
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 (Rash in body folds): Causes, Images, and More - DermNet
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 differential diagnosis of itchy skin - DermNet
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.
Livedo reticularis - DermNet
Livedo reticularis refers to various conditions in which there is mottled discolouration of the skin. It is described as being reticular (net-like, lace-like), as cyanotic discolouration surrounds pale central skin. The terminology of livedo reticularis may …
Textile contact dermatitis
Textile contact dermatitis is typically characterized by delayed reactions such as redness, scaling and itchiness. The symptoms may appear within hours of contact with the material, or sometimes a reaction may not be seen until days later. The areas of the body most often affected are the crooks of the arm, backs of the knees, armpits, groin ...
Autoimmune Progesterone Dermatitis (APD) — DermNet
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
Photosensitivity (sun allergy) - DermNet
Photosensitivity refers to various symptoms, diseases and conditions caused or aggravated by exposure to sunlight. 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.