Shin splint occurs in runners having flat feet and improper running shoes.
You should give Cryotherapy (Ice therapy) thrice a day for a week.
You should give rest till the pain subsides. As of now you should stop running and start doing other exercises like elliptical bike ride, swimming etc.
You should be pain free atleast for 2 weeks before returning to running.
You can wear stockings while running to prevent swelling.
Next Steps
You should wear motion control shoes if you have flat feet.
Your shoes should have 1/2 inch space between your big toe and shoe tip.
You should purchase shoes in the evening to get right fit shoes.
You should do leg muscles and hip stretching and strengthening exercises.
Health Tips
If the pain persists or aggrevates you need consult to a Physician or Physiotherapist or Orthopaedist for further evaluation and treatment.