Sandy dermatitis, also known as (frictional mossy rash), is a papular dermatitis that occurs on the back of the hands, forearms and elbows and knees. The etiology of the disease is unknown, but it is mainly thought to be related to nonspecific mechanical stimuli, such as playing with mud and sand, being stimulated by friction with blankets or contact with cold water. It is also thought to be related to sun exposure and viral infection.
Clinical characteristics of sand dermatitis 1. Age of onset: It occurs in children aged 2 to 9 years.
2, the onset of the season: summer and autumn onset.
3, lesion site: lesions can start to appear in individual parts, preferably on the back of the hand, forearm, finger back, etc., can gradually spread to other parts, such as forearms, elbows, knees, upper arms, thighs or trunk and other parts; distribution is often sparse, a few have a tendency to cluster, symmetrical distribution.
4, lesion characteristics: round, flat or mounded raised papules, sometimes covered with fine furred scales, may be moss-like. Normal skin color, grayish white or light red. There are usually no conscious symptoms, but it may also be mildly pruritic. The disease is self-limiting. In severe cases, the lesions may spread all over the body, with severe itching, causing self-sensitivity dermatitis. The duration of the disease is 4-8 weeks.
The first thing you should do is to avoid sand and external stimuli, and to strengthen the care of children to reduce mechanical friction.
2, drug treatment can be topical corticosteroids, such as flouro easy, trimethoprim ointment, alloxan, eutrophonium, parethone, etc. can be. If parents have concerns about “hormone ointment”, there are also non-hormone to recommend: such as zinc oxide ointment, eczema healing, Mansuradom mint cream, etc. The principle is to stop itching, but the effect must be worse than the hormone class, the course of treatment may be extended.
In fact, topical hormones are rarely absorbed by the system, and the recommended ones are weak to moderately effective, so parents can rest assured. Therefore, 1-2 weeks of hormone ointment can be used in the early stage to reduce the child’s discomfort and avoid scratching to aggravate the lesions again.
3. For those with generalized lesions and severe itching, oral antihistamines can be administered, commonly used in children are paracetamol, Xantamine drops, keratan syrup, etc. The dosage can be calculated according to the kilogram of body weight with reference to the instructions.