Hi and welcome to HCM.
It sounds like benign subcutaneous lesion. Most common are lipomas
, vascular tumours,cysts and ateromas. It usually dont cause problems until it become inflammed. Also this can be foliculitis. As you have certain symptoms i suggest to remove it surgically because it wont heal by itself. Also malignancies are rare,but must always be ruled out. The only way to be sure is to perform biopsy
WIsh you good health.