Hi, thanks for writing to HCM. Well, if I were your family physician and had you presented this painful hard knot on the head, I would clarify some important facts about such nodules as follows: 1. there are few possibilities in this case and all of them are benign or inflammatory therefore not to worry but must be investigated properly! possibilities are: small boil, hair-follicle infection, resolving abscess, neurofibroma, pilomatricoma, varieties of infections and small abscess; pyogenic granuloma or hemangioma-like pathology; etc.. 2. the disease needs to be confirmed and before any empirical therapy! therefore you need to get to your doctor for a simple examination and relevant tests if necessary! ... Hope this answers your question. If you have additional questions or follow up questions then please do not hesitate in writing to us. I will be happy to answer your questions. Wishing you good health.