Which of the following diagnostic criteria is used to differentiate acne vulgaris from acne rosacea?

Explanation: Choice c indicates a need for further teaching because applying a thick layer of moisturizer before bedtime can potentially clog pores and worsen acne. While moisturizing is essential for preventing dryness, it is essential to use non-comedogenic, oil-free moisturizers that are suitable for acne-prone skin.

Incorrect choices: a. "I will cleanse my face with a mild, non-soap cleanser twice a day." - This statement is correct as cleansing the face with a mild, non-soap cleanser twice a day helps remove dirt, excess oil, and debris without drying out the skin excessively.

b. "I will use a topical retinoid as prescribed by my healthcare provider." - This statement is correct as topical retinoids are a common treatment for acne vulgaris and help promote skin cell turnover and prevent clogged pores.

d. "I will avoid picking or squeezing acne lesions to prevent scarring." - This statement is correct as picking or squeezing acne lesions can lead to infection, inflammation, and scarring.

Explanation: The small, white bumps on the patient's forehead and chin are characteristic of closed comedones, also known as whiteheads. Comedones are non-inflammatory lesions and are one of the primary clinical manifestations of acne vulgaris.

Incorrect choices: a. Papules - Papules are small, red, inflamed bumps that may be present in acne vulgaris. However, they are not associated with the small, white bumps described in this question.

b. Pustules - Pustules are pus-filled lesions seen in acne vulgaris, but they are not the correct term for the small, white bumps in this scenario.

d. Nodules - Nodules are large, painful, solid lesions that extend deeper into the skin. They are not the correct term for the white bumps described in the question.