Do you have any other associated symptoms like fever or weight loss
,or not feeling hungry, or cough and cold in the recent past? The lymph nodes can be reactively enlarged due to upper respiratory tract
infection or any infection of scalp
in the hair could be one of the reasons. Would advice you to consult your doctor and go for antibiotic course for a week as any du clinical infection would come under control with it and lets see whether they disappear or not.