Suddenly developed red blood blisters on the hand

Sudden appearance of red blood blisters on the hands may be caused by friction or pressure, burns or frostbite, contact dermatitis, insect bite dermatitis, viral infections, etc. Symptoms can be improved through local care, avoiding irritants, and medication. If the number of blisters increases, they rupture and become infected, or are accompanied by severe pain, prompt medical attention is necessary.

1. Friction or Pressure Injury: Prolonged manual labor or physical compression and friction on the hands can cause capillaries under the skin to break and bleed, accumulating to form red blood blisters, often accompanied by mild local swelling and pain. It is recommended to avoid pressing on the blisters, cover them gently with sterile gauze for protection, and reduce local movement and friction.

2. Burns or Frostbite: Exposure of the hands to high-temperature objects or cold environments can damage the skin and rupture capillaries, leading to red blood blisters. Burns are typically associated with a burning sensation, while frostbite causes numbness and stinging pain. For burns, rinse with cool water and apply a cold compress; for frostbite, warm the area gradually. In both cases, avoid puncturing the blisters.

3. Contact Dermatitis: Skin inflammation triggered by contact with allergens or irritants such as pollen or detergents increases capillary permeability, resulting in blood blisters along with itching and red patches. It is recommended to use medications such as calamine lotion, desonide cream, or loratadine syrup under medical guidance to relieve symptoms.

4. Insect Bite Dermatitis: Mosquito or insect saliva can trigger an allergic reaction after biting, causing localized red blood blisters along with noticeable itching and swelling. Patients may use hydrocortisone butyrate cream, cooling oil, or cetirizine drops as directed by a physician to alleviate symptoms.

5. Viral Infection: Infection of the hand skin by viruses such as herpes simplex virus can lead to clusters of red blood blisters, accompanied by burning and stabbing pain, which are prone to rupture and crust over. Patients may follow medical advice to use acyclovir cream, penciclovir gel, or ribavirin granules to improve symptoms.

Maintain clean and dry hands, avoid scratching blisters to prevent rupture and infection. Use protective measures when handling objects, eat a light diet rich in fruits and vegetables, drink plenty of water, and minimize intake of spicy and irritating foods to support skin recovery.