postules

Postules (often written pustules) are small, raised skin lesions that contain pus. They are usually less than 1 centimeter in diameter and result from an inflammatory response that causes neutrophils, bacteria, and tissue debris to accumulate within the epidermis or hair follicle. Pustules can appear alone or in clusters and may be surrounded by red, inflamed skin. They are commonly seen in acne, folliculitis, impetigo, rosacea, and certain viral infections such as chickenpox. Sterile pustules can occur in conditions like pustular psoriasis or drug reactions.

Diagnosis is typically clinical, based on appearance and distribution. Cultures or skin scrapings may be used if a bacterial infection is suspected, or to guide antibiotic choice.

Treatment depends on cause and extent. Mild, localized pustules may improve with gentle cleansing, non-irritating skincare, and topical antiseptics or antibiotics (such as topical mupirocin) if bacterial infection is suspected. More extensive or persistent pustules may require oral antibiotics and medical evaluation. Viral infections are managed with supportive care; pustular psoriasis or AGEP require specific dermatologic treatment.

Prevention focuses on skin hygiene, avoiding picking or squeezing lesions, and managing underlying conditions. Seek medical advice if pustules are accompanied by fever, spreading redness, increasing pain, swelling, or if they occur in immunocompromised individuals.