Vesiculation is a medical term used to describe the formation of small fluid-filled sacs or blisters on the skin or mucous membranes. Some common synonyms for vesiculation in medical terminology include blistering, bullae formation, and bullous dermatitis. These conditions are commonly caused by skin irritation, infection, or certain autoimmune diseases. In addition, vesiculation can also be associated with insect bites and tree sap contact. It is important to seek medical attention if vesiculation persists, as it can indicate a more serious underlying medical condition such as herpes simplex or chickenpox. Treatment may include topical or oral medications to alleviate symptoms and prevent further blister formation.