Hello there
Well in all probability it looks like you are suffering from shin splints.....it is fairly a common condition in atheletes and runners and occours due to running on uneven or hard surface and with improper footwear....however stress fracture of tibia also has similar symptoms......do get back with detail symptoms so as to properly analyse your problem and formulate a treatment plan.
Regards
Next Steps
Dr Raviraj Francis
MPTh(Rehab),MPT(Ortho).UK