A nodule on your baby’s face can be caused by boils and sebaceous cysts, which can be relieved by medication and surgery. 1. Boil: It is a red, hemispherical painful nodule, mostly caused by Staphylococcus aureus, and preferably on the face. Most boils burst and heal on their own without treatment. Topical antibiotics such as mupirocin ointment can also be used under doctor’s supervision. 2. Sebaceous cysts: These are single, round, medium-hard nodules. The treatment of sebaceous cysts is mainly based on surgical excision. There are many other causes of nodules on the face, you should go to the hospital in time, improve the relevant examination to clarify the cause of the disease, under the guidance of the doctor symptomatic treatment.