This is contagious. It often spreads from one family member to another. Pustules are yellow-white and surrounded by narrow red rings.
Pustules discharge a blood-stained pus made from dead cells.
Infection spreads to other parts of the body by fingernails, frequently from Staphylococcus in the nose. Infection with Pseudomonas bacteria following the use of contaminated hot tubs or spas. This is rare but increasing. Recent illness such as a nose infection. Eczema or dermatitis.