![]() ![]() The trapped sweat leads to irritation (prickling), itching, and a rash of very small blisters, usually in a localized area of the skin. #FIRST BITE BOOK SKIN#Miliaria occurs when the sweat gland ducts get clogged due to dead skin cells or bacteria such as Staphylococcus epidermidis, a common bacterium that occurs on the skin, which is also associated with acne. : 24 Colloid milium Ĭolloid milium is a skin condition characterized by a translucent, flesh-colored, or slightly yellow, 1 to 5 mm papules. Occlusion miliaria is a skin condition that is accompanied by anhidrosis and increased heat-stress susceptibility, all after the application of extensive polyethylene film occlusion for 48 hours or longer. Tropical anhidrotic asthenia is a skin condition, a rare form of miliaria, with long-lasting poral occlusion, which produces anhidrosis and heat retention. ![]() Postmiliarial hypohidrosis is a skin condition that results from occlusion of sweat ducts and pores, and may be severe enough to impair an individual's ability to perform sustained work in a hot environment. Miliaria pustulosa is preceded by another dermatitis that has produced injury, destruction, or blocking of the sweat ducts. Miliaria pustulosa describes pustules due to inflammation and bacterial infection. Miliaria profunda is also less commonly known as "mammillaria" : chapter 40 Miliaria pustulosa : 24 The rash tends to be flesh-coloured as opposed to the prominent redness of miliaria rubra, and the risk of heat exhaustion is larger. Miliaria profunda is characterised by non pruritic, flesh-coloured, deep-seated, whitish papules. The rash and associated symptoms tend to appear within hours of an activity provoking sweating, but similarly fade within hours when the stimulus for the sweating is removed. The obstruction is deep in the structure of the sweat gland, causing the gland's secretions to leak between the superficial and deep layers of the skin. The most severe form of miliaria, miliaria profunda, sometimes referred to as "wildfire" due to the rapid spread and severe burning sensations, generally occurs as a complication of repeated episodes of miliaria rubra. Both disorders share a common trait of appearing after taking a hot shower. Differential diagnosis should be used to rule out polycythemia vera, which is a rare hematological disorder and appears more often in males than females, generally not before the age of 40. Miliaria rubra is also known as prickly heat and heat rash. : 23 A small risk of heat exhaustion exists due to inability to sweat if the rash affects a large proportion of the body's surface area or the patient continues to engage in heat-producing activity. This form of the illness is often accompanied by the typical symptoms-intense itching or "pins and needles" with a lack of sweating ( anhidrosis) to affected areas. The most commonly encountered form of the illness is miliaria rubra, in which obstruction causes leakage of sweat into the deeper layers of the epidermis, provoking a local inflammatory reaction and giving rise to the typical appearance of redness (hence rubra) and larger (but still only a few millimetres), blister-like lesions. The superficial vesicles are not associated with an inflammatory reaction. : 23 Miliaria crystalline is also known as miliaria crystallina, and sudamina. The most superficial obstruction (with the most mild clinical presentation), is known as miliaria crystalline instead of a rash, the patient presents with multiple, tiny, blister-like lesions that look like beads of perspiration and essentially cause no symptoms. ![]() Miliaria can be classified according to the top level at which obstruction occurs in the sweat glands. Those who suspect they have shingles and not miliaria should seek medical advice immediately as the sooner antivirals are taken, the better. It is also accompanied by a prickly sensation and pain throughout the region. Shingles is limited to one side of the body, but also has a rash-like appearance. The symptoms relating to miliaria should not be confused with shingles, as they can be very similar. A related and sometimes simultaneous condition is folliculitis, where hair follicles become plugged with foreign matter, resulting in inflammation. Other areas include skin folds and areas of the body that may rub against clothing, such as the back, chest, and stomach. These may simultaneously occur at a number of areas on a patient's body, the most common including the upper chest, neck, elbow creases, under the breasts, and under the scrotum. Symptoms of miliaria include small, red rashes, called papules, which are irritated and itchy. ![]()
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