Hello,
Its an Over use injury.
Many reasons for Shin pain
* Lack of calf muscle flexibility
* Lack of calf muscles strength
* Too much and Too soon
(Before your getting your muscles and ligaments stronger if you increase the milage per week)
* Worn out shoes and more....
Next Steps
1.STOP running for 4 weeks
2.Ice 15 mins x twice
3.Consult a SPORTS Physio for a Global Musculoskeletal assessment
4.Stretch your calf periodically (5-8 times/ day)
5.Resume with proper Work:Rest ratio 6.Reduce the milage
7.Increase the rest period between run
8.Progress the distance or milage or intensity gradually)
Health Tips
If you don't follow this gold standard universal recommendation you may end up with stress fracture in your shin bone.