The first is a dermatofibroma, the cause of which is not clear. The rash is yellowish or dark brown in color, relatively well-defined and very hard to the touch. Clinically, surgical excision is required and the excised tissue mass needs to be sent to the pathology laboratory for further histopathological examination. The second type of boil may be caused by bacterial infection, so blood tests can be performed to see if the white blood cells are elevated, and anti-inflammatory and anti-infective treatment can be given accordingly. You can order cephalosporin antibiotics or roxithromycin or azithromycin, and use topical mupirocin ointment, or compound polymyxin B ointment or fusidic acid ointment. The patient is advised to avoid spicy and stimulating diet, avoid alcohol, excessive exertion and poor rest.