Hi ! Good afternoon. I am Dr Shareef answering your query. From the history of something white coming out on pressure points to the tentative diagnosis of a benign sebaceous cyst of the scalp. I would suggest you to consult a general surgeon in your area who might advise your wife for a excision biopsy for a definitive diagnosis and cure. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing health care magic to clear doubts on your health problems. Wishing you an early recovery. Dr Shareef.