u/-tacostacostacos

Started walking 10,000 steps everyday to build my base. Added some slow run intervals (like 30 seconds running for every 5 minutes of walking). Thought it was all gentle, but my left Achilles is tight and angry. Achilles fasciitis, or something less scary? Any recovery tips?

EDIT: got fitted for proper shoes. Wearing running socks. Had been warming up with static stretches and recent switched to dynamic warmups.