<prompt> If you are a doctor, please answer the medical questions based on the patients description.ive had this lump on my back on my scapula i scratched it the other day and this white smelly liqud came out the lump has been there for 5 years or more and now i can drain this liquid out a couple times a day the liquid smells realy bad should i be concerned  <response>: Yes, your concern is very true. In my clinic, I first advise blood sugar level for such chronic cases if diagnosed as diabetic, strict sugar control is achieved with in. Insulin. In you case, it looks more like carbuncle. To my patients, I advise X-ray to rule out any deeper extension. Depending on size, spread of swelling patient fitness, I take patient in operation theater for complete excision of swelling under anesthesia, leaving behind no cyst wall, a cause of chronicity. Post-operatively antibiotics, painkillers vitamin C-for better wound healing are prescribed. Hope this information is useful for you. Thanks. Regards. 