Hi! Good evening. I am Dr Shareef answering your query. Although the lumps on your son s scalp and lower down need to be assessed clinically, from the history it seems that the lower lump could be an inflamed lymph node draining the area of the bug bite or ulcer created by the scratch by your son on his scalp. If I were your doctor, I would refer your son to a dermatologist to rule out any kind of skin problem in the scalp for which he scratched that site. After local treatment of the site, he may prescribe your son with a broad spectrum antibiotic and an anti inflammatory drug which would control the infection/inflammation on both sites and he would be relieved. 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. I wish you an early recovery. Dr Shareef.