DYSHIDROSIS, is a type of dermatitis , that is characterized by itchy
blisters on the palms of the hands and bottoms of the feet. Blisters
are generally one to two millimeters in size and heal over three
weeks. However, they often recur. Redness is not usually present.
Repeated attacks may result in fissures and skin thickening .
The cause is unknown. Triggers may include allergens, physical or
mental stress , frequent hand washing, or metals. Diagnosis is
typically based on what it looks like and the symptoms. Allergy
testing and culture may be done to rule out other problems. Other
conditions that produce similar symptoms include pustular psoriasis
and scabies .
Avoiding triggers may be useful as may a barrier cream . Treatment
is generally with steroid cream . High strength steroid creams may be
required for the first week or two.
Antihistamines may be used to
help with the itch. If this is not effective steroid pills,
tacrolimus , or psoralen plus ultraviolet A (PUVA) may be tried.
About 1 in 2,000 people are affected in
Sweden . Males and females
appear to be affected equally. The first description was in 1873. The
name comes from the word "dyshidrotic," meaning "difficult sweating,"
as problems with sweating was once believed to be the cause.
* 1 Signs and symptoms
* 2 Causes
* 3 Diagnosis
* 4 Treatment
* 5 Epidemiology
* 6 See also
* 7 References
* 8 External links
SIGNS AND SYMPTOMS
Dyshidrosis has been described as having the following
* Itchiness of the palms or soles, followed the a sudden development
of intensely itchy small blisters on the sides of the fingers, the
palms or the feet.
* These blisters are often described as having a "tapioca pudding "
* After a few weeks, the small blisters eventually disappear as the
top layer of skin falls off.
* These eruptions do not occur elsewhere on the body.
* The eruptions may be symmetrical.
Advanced stage of dyshidrosis on the fingers
Advanced stage of palmar dyshidrosis on the palm showing cracked and
Advanced stage of dyshidrosis on the foot.
Rim of scale on the palmar surface of the thumb from a resolving
The exact causes of dyshidrosis are unknown. In 2013, a randomized,
double-blind, placebo-controlled cross-over study by the University
Medical Center Groningen reported that dyshydrosis outbreaks on the
hands increased significantly among those allergic to house dust mites
, following inhalation of house dust mite allergen.
Food allergens may be involved in certain cases. Cases studies have
implicated a wide range of foods including tuna , tomato , pineapple ,
chocolate , coffee , and spices among others. A number of studies
have implicated balsam of Peru .
Dyshidrosis is diagnosed clinically, by gathering a patient's history
and making careful observations (see signs and symptoms section).
Severity of symptoms can also be assessed using the dyshidrotic eczema
area and severity index (DASI). The DASI has been designed for
clinical trials and is not typically used in practice.
There are many treatments available for dyshidrosis. However, few of
them have been developed or tested specifically on the condition.
* Barriers to moisture and irritants, including barrier creams and
* Topical steroids - while useful, can be dangerous long-term due
to the skin-thinning side-effects, which are particularly troublesome
in the context of hand dyshidrosis, due to the amount of toxins and
bacteria the hands typically come in contact with.
Potassium permanganate dilute solution soaks - also popular, and
used to 'dry out' the vesicles, and kill off superficial
Staphylococcus aureus , but it can also be very painful. Undiluted it
may cause significant burning.
Dapsone (diamino-diphenyl sulfone), an antibacterial , has been
recommended for the treatment of dyshidrosis in some chronic cases.
Fexofenadine up to 180 mg per day.
Alitretinoin (9-cis-retinoic acid) has been approved for
prescription in the UK. It is specifically used for chronic hand and
foot eczema. It is made by Basilea of Switzerland (BAL 4079).
* Systemic steroids can be taken orally to treat especially acute
and severe cases of dyshidrosis.
About 1 in 2,000 people are affected in
Sweden . Males and females
appear to be affected equally.
Epidermolysis bullosa - a genetic disorder that causes similar,
albeit more severe, symptoms to those of dyshidrosis.
Dermatitis herpetiformis - a similar condition caused by celiac
and often mistaken for dyshidrosis.
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* ^ "Dyshidrosis".
Merriam-Webster . 2014.
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* ^ A B "What Is Atopic Dermatitis? Fast Facts". NIAMS. November
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