Hi. Thanks for your query. Noted your history and understood your concerns. Bony lump on the outside of the left ankle which is painless but with pain in the front ligament on walking indicates the following: This may be a bony spur in spite this is not the commonest site of this. Another possibility is of a hard bunion that appears like a bony outgrowth as the skin here is not mobile making the bunion to appear hard and like a bone. Hence the best way is to consult a General Surgeon or an Orthopedic Surgeon so that a proper clinical evaluation and proper management planned. Till then apply a crepe bandage to stabilize the ankle joint so that the painful ligament can be stabilized.