Hi, happy to help you on your health concern on part of HCM! In the present case of left inguinal lump, if I were your consulting physician, I would just say you, nothing to worry! Just avoid rubbing or hitting over it; it might disappear itself! As per your description, it is a benign harmless lesion like a reactive lymph node due to some local inflammation in the inguinal region; this is a common finding! However, it could be related to the epididymis and be a cyst or some tumor even infections like tuberculosis! If you are still worried, please get examined by a surgeon or get some FNAC like cytological examination or revert back to us. Hope you got your answer. Please feel free to write to us if any more queries. Wishing you the best health!