Most common with runners, shin splints (or periostitis) are a painful swelling of the connective tissue that covers the bones. They’re caused when the tissue gets overworked by repetitive activity – especially in situations where a normally sedentary person has suddenly started exercising vigorously. They can also be caused by pronation or rolling in your foot as you walk and run. We will examine your leg and may order additional tests to rule out other problems such as stress fractures or tendonitis. He will determine whether you’re wearing the right footwear when you’re exercising and recommend orthotics where needed.