Massachusetts State Board Esthetics Practice Exam

What is a bulla in dermatological terms?

1. A small flat spot or discoloration

2. A large blister containing watery fluid

3. A type of acne cyst

4. A solid lump larger than a papule

The correct answer is: A large blister containing watery fluid

A bulla is defined in dermatological terms as a large blister that contains watery fluid. These blisters can form due to various factors, including friction, burns, or certain skin conditions, and they typically measure more than 0.5 centimeters in diameter. Understanding the characteristics of a bulla is crucial for proper diagnosis and treatment in esthetics, as it helps in distinguishing it from other skin lesions. For instance, a small flat spot or discoloration refers to a macule, which is not raised and does not contain fluid. Acne cysts are typically deeper lesions that are associated with infection and inflammation, rather than being merely blisters filled with clear fluid. A solid lump larger than a papule is known as a nodule; these differ from bullae because nodules are solid masses rather than fluid-filled. Recognizing these differences is essential for estheticians and other skincare professionals in order to provide appropriate care and referrals.