This morning I had a lump on the back of my ankle/heel. It didn't hurt to move or touch it. I pushed and massaged it for a bit and after some activity, it mostly went away. Should I be concerned about Achilles tendon issue and see someone about it? I did jog last night for the first time in a LONG time. I walked for about 1/2 hour today (a relatively slow walk) and it didn't come back or get any worse but there was a very slight pain in my calf.