Foot Pain Diagnosis More Condition_symptoms Pain Where The Foot Meets The Shin?

Pain where the foot meets the shin? - foot pain diagnosis more condition_symptoms

Ive had this pain for a while in his right leg when the foot meets the tibia, the foot is not all and not on the shin. If you drew a circle facing the ankle again on the back, heel and ankle pain is outside, where the foot meets the shin. only on the right foot

Pain is very annoying when I'm sitting worsens when bending the foot and toes toward the shin, and when the foot bears the weight, standing, walking, etc. ..

Ive been training for a marathon, but the pain became unbearable, when I have 2 + mile walk (yes, short). Need help before the marathon

any action or diagnosis of this pain would be much appreciated