What causes redness on the back of the hand without pain or itching, and what should be done about it?

The back of the hand turning red without pain or itching may be caused by environmental temperature changes, friction, contact dermatitis, allergic dermatitis, or keratosis pilaris. Symptoms can be improved by adjusting the environment, avoiding irritants, and using medication. If the redness spreads or is accompanied by itching or pain, seek medical attention promptly.

1. Environmental temperature stimulation: The skin on the back of the hand may temporarily turn red due to abnormal blood vessel constriction and dilation caused by exposure to high or low temperatures. It is recommended to adjust the ambient temperature, avoid direct exposure of the hands to extreme temperatures, and gently wash with lukewarm water followed by gentle drying.

2. Friction irritation: Frequent rubbing against hard objects can cause mild localized redness and congestion on the back of the hand, without other discomfort. Reduce friction by avoiding carrying heavy items or touching rough surfaces. Apply a gentle moisturizing cream to the affected area.

3. Contact dermatitis: Skin inflammation triggered by contact with irritants such as pollen or detergents leads to patchy redness on the back of the hand, sometimes accompanied by mild swelling. Under medical guidance, use medications such as calamine lotion, desonide cream, or loratadine tablets to relieve symptoms.

4. Allergic dermatitis: An allergic skin reaction after exposure to allergens causes diffuse redness on the back of the hand, typically without significant pain or itching. Patients may take cetirizine hydrochloride tablets, mometasone furoate cream, or vitamin C supplements under medical supervision to alleviate symptoms.

5. Keratosis pilaris: Abnormal keratinization causes redness around hair follicles, resulting in small, pinpoint red spots with a rough texture upon touch. Follow medical advice to apply tretinoin cream, urea ointment, or salicylic acid ointment to improve symptoms.

Maintain clean and well-moisturized skin on the back of the hand. Choose mild skincare products, avoid suspected irritants, practice sun protection when outdoors, apply moisturizer appropriately, and maintain a balanced diet rich in vitamins to support stable skin health.