Outside of my right foot hurts, been hurting for months now, hard bump size of bouncy ball, hurts when pressed?

the outside of my right foot hurts when i walk on my foot or press on the large bump that has formed on it. it's pretty painful, hurts more in the evening after being on it all day. its just the side of my foot that hurts and sometimes the pain will shoot from that point to my pinkie toe. it's not underneath the foot that hurts at all. the pain has been going on for months now, really can't say how long because it's been so long. i had torn a tendon when i was a lot younger and it seems to be in the same spot where the pain is occurring.