Hi ! Good morning. I am Dr Shareef answering your query. With your kind of history of bleaching of hair with a dry itchy sore on your scalp, most likely the lymph node is due to secondary response to superadded infection in your scalp sore. If I were your doctor, I would go a for a general physical examination of yours including the sore of scalp and the lump on the neck, and start a broad spectrum antibiotic for the sore to heal, which might also heal the secondary infection of the lymph node in case. If if persists, or increases, then I would advise you t consult a general surgeon who might advise you for a FNAC or an excision biopsy for a histology test of the lesion for arriving at a diagnosis. 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.