Medical director. Within emergency medical services a medical director is a physician who provides guidance, leadership, oversight and continuous quality improvement (CQI) for the practice of local EMTs and paramedics within a predefined area.
It may be as tiny as the top of a pin or up to 5 millimeters wide. A larger blister is called a bulla. In many cases, vesicles break easily and release their fluid onto the skin. When this fluid dries, yellow crusts may remain on the skin surface.
bullous impetigo â a contagious skin infection that mainly affects children and causes sores and blisters. bullous pemphigoid â a blistering skin condition that tends to affect the elderly. contact dermatitis â a type of eczema caused by skin contact with a substance that causes irritation or an allergic reaction. hand, foot and mouth disease â a viral infection that mainly affects young children, which can cause small blisters to develop on the fingers and palms of the hands.