Hello! Welcome to HCM. Yes, your concern is very true. This can be a dermoid cyst or lipoma or sebaceous cyst or osteoid osteoma, all of which are benign lumps. Dermoid is usually in midline. Lipoma is typically soft in consistency. Osteoma is a benign bone tumor typically very hard in consistency & almost immobile. In my clinic, many such patients come to whom I advise FNAC-fine needle aspiration cytology, if in doubt clinically. Treatment is usually excision biopsy i.e. lump is removed under local anaesthesia & sent for histopathological examination. Only concern is when it is growing rapidly in size, it can be malignant, in which case you should consult your doctor as early as possible. Hope this helps. Wish you speedy recovery. Thanks. Regards.