A collection of fluid underneath the top layer of skin (epidermis). There are many causes of blisters, including burns, friction forces, and diseases of the skin. Also known as bleb and bulla
eMedicineHealth (Experts for Everyday Emergencies - eMedicineHealth does not provide medical advice, diagnosis or treatment), Cold Hands and Feet Glossary of Terms, 2015. (MedTerms Medical Dictionary) http://www.emedicinehealth.com/cold_hands_and_feet /glossary_em.htm and http://www.medicinenet.com/script/main/alphaidx.as p?p=a_dict, (Med Emr Prep - Amer) {871}