Sand dermatitis, also known medically as “friction mossy rash”, is a disease with some specificity, mostly seen in children aged 2-7 years old, why? The pathogenesis is mostly related to mechanical friction, such as children playing with playdough, sand, toys, etc., but some experts believe that the sun factor should not be ignored. At this age, babies have poor autonomy, are active, do not pay attention to the contact mode and posture, so as long as the exposed skin (solid spring and summer, early autumn season is common) and frictional material frequent contact will lead to the occurrence of the disease. The general skin lesions are light red or skin-colored flat, hemispherical papules of the size of a pin cap to a small grain of rice, with a large number of them, often in the state of “clustered into a group, scattered around”, most often on the back of the hands, wrists, forearms, because these parts are easy to rub. If some children often crawl and play on the floor, both knees can also occur. Most children feel itchy and can scratch involuntarily, but this may cause changes in the rash, secondary to mossy changes that make the skin thicken and brown. Knowing the cause of this disease, then the treatment is naturally clear. One of the principles is to avoid sand and adverse external stimuli, to strengthen the care of children, and to reduce mechanical friction. If a rash appears, topical corticosteroids can be used, such as Flonase, Tretinoin ointment, Elocon, Eudrone, Pirenzone, etc. can be used. If parents have concerns about “hormonal ointments”, there are also non-hormonal ones to recommend: such as zinc oxide ointment, eczema healing, Mansuradom peppermint cream, etc. The principle is to stop itching, but the effect must be worse than hormonal ones, and the course of treatment may be extended. My suggestion is to add 1-2 weeks of hormonal ointment early on to reduce the child’s discomfort and avoid scratching to aggravate the lesions again. Topical hormones are rarely absorbed systemically, and the recommended ones are weak to moderately effective, so parents can rest assured. If itching is still intense (especially at night), you can add antihistamines, commonly used in children, such as paracetamol, Xantamine drops, keratan syrup, etc. The dosage can be calculated according to the kilogram of body weight, according to the instructions.