Pustules: Are smaller than 5–10

Pustules are smaller than 5–10 mm, and filled with pus, that is, purulent material composed of inflammatory cells (neutrophils). Pus can indicate bacterial, fungal or viral infection Welcome to our comprehensive guide on pustules – those pesky little bumps that can pop up uninvited on our skin. Whether you’re familiar with these inflamed bumps or just curious to learn more, we’ve got you covered. Learn the differences between papules, pustules, and nodules, three common types of skin lesions. Find out the causes, treatments, and pictures of each type and how to diagnose them. Acne pustules are red, inflamed pimples with white heads filled with pus. They occur when pores become clogged with oil, bacteria, and cell debris. Learn how to prevent and treat them with topical, oral, or photodynamic therapy.