I read the article on plantar fascilitis available here but I don't think it's that. I'm 23, play soccer, ping pong despite having a sedentary lifestyle (9-to-5 job plus more freelancing laptop job). The pain is in the left foot, where you'd hit to score a backheel goal and I don't score with like that.
The pain builds up when I'm walking after being a seated position for like 1 hour+ and also during certain sprints. It goes away on its own; it's like a broken bone, aching type pain but manageable.
Do I need to see a doctor?