I recently started taking parkour lessons and after a full day of vaulting and jumping around, the area around my hip flexor (or possible the hip flexor itself, I'm not a doctor) hurts. For some reason, it seems to only happen to my right leg (probably because of a tendency to vault a certain way based on right-handedness). When I stand on my left leg and then lift and rotate my right leg, it feels like a tendon being caught on something. Sometimes after a few rotations or stretching, the feeling will go away (though the soreness remains) but then return again later.
I'm trying my best not to fall into the trap of trying to self-diagnose with the internet and I can't afford a doctor for the time being, so I'm hoping to find some advice here. Is anyone familiar with the feeling I'm describing? How can I treat and prevent it?
Attempting to push my knees down while in the butterfly position causes a feeling of tightness (of both legs) in the same spot and I believe it may be similar to what the poster of a similar question experiences.