If your bone spur can be felt below your right ankle, it would actually have to be pretty big. Most bone spurs cannot be felt. It may also not be a bone spur but a soft tissue growth that has hardened and become tense/ swollen, and that's why it feels "hard", like a bone.
If the symptoms bother you, and affects your foot & ankle and activities, you should see an orthopaedic surgeon. A thorough examination and radiological investigations would be needed to identify what this is. Sometimes medication and physical therapy may help. Sometimes surgery may also be indicated to remove the bone spur/ lump.
Kind regards
Dr Sean Ng