What is the cause of skin blistering itching? The shape is round.

Skin blistering itching is caused by allergies. Allergy is the result of the joint action of external allergens and body reactions. It can involve respiratory, digestive, nervous and other systems, leading to skin lesions. Severe cases are life-threatening. Prevent contact with allergens. Patients with dust mite allergies should often clean bedding and dry exposure.