<s>[INST] Hi, on my left leg, at the bottom of my shin and just above my ankle there is a small lump which is ball like, it does not cause pain unless hit hard and is only slightly discomforting when being touched, what could this be? do i need to see my doctor? [/INST] Hi! thanks for writing to us sharing your problem of the painless hard lump on leg above ankle!If I were your family physician and had you presented to me with this problem, I would like to consider following possibilities, as per my experience of ultrasound, CT scan and needle biopsies:1. benign cyst or cyst-like conditions like bursa, sebaceous cyst, ganglion, hemangioma, lymphangioma or parasitic cyst2. benign skin nodules or tumors like lipoma, neurofibroma, dermatofibroma, fibrous histiocytoma etc Therefore, you need not worry about this one but please see a doctor today for an examination and if needed simple needle biopsy for confirmation of the lesion's nature!Regards, </s>