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What causes pus-filled sores that break open and crust?

Dr. Mehmet Oz, MD
Cardiology (Cardiovascular Disease)
Pus-filled sores that break open and crust are usually caused by bacteria that get inside pores. As the bacteria grow into pus-filled pimples, the pimples eventually can break open, bleed, and crust over as the skin heals. Folliculitis and impetigo are causes of pus-filled sores. Herpes simplex virus (oral and genital herpes) and herpes zoster (chicken pox and shingles) can also cause blisters that eventually crust. Pustular psoriasis causes pus-filled bumps but they do not contain bacteria.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.