Red spots appear on hands and lower legs, becoming itchier when scratched

Red spots appearing on the hands and lower legs that become itchier when scratched may be caused by physiological factors, or by pathological conditions such as insect bite dermatitis or contact dermatitis. Treatment can be achieved through general care or medication. Specific details are as follows:

I. Physiological Factors

If a person is in a hot environment, it may cause localized dryness of the skin, leading to symptoms of redness and itching. It is recommended to bathe regularly and frequently apply body moisturizers.

II. Pathological Factors

1. Insect Bite Dermatitis

After a mosquito bites the skin, its secretions can irritate the underlying tissue, causing local capillary dilation. This allows tissue fluid from the blood to leak out of the vessels, triggering inflammation, resulting in red spots accompanied by itching. Under medical guidance, topical erythromycin ointment or oral cetirizine hydrochloride capsules may be used for treatment.

2. Contact Dermatitis

This occurs when the skin or mucous membranes come into contact with toxic, allergenic, or irritating foreign substances, leading to skin redness, itching, and blisters. Under medical supervision, treatment may include topical triamcinolone acetonide and econazole cream or oral methylprednisolone tablets.

In addition to the above causes, similar symptoms may also result from solar dermatitis, urticaria, or eczema. It is important to adjust the diet and increase intake of foods rich in vitamins.