Shin Splints. The term “shin splints” describes pain felt along the inner edge of your shin bone. Shin splint pain concentrates in the lower leg between the knee and ankle. Your doctor may refer to the condition as medial tibial stress syndrome (MTSS).Shin splints frequently affect people who engage in moderate to heavy physical activity.he term “shin splints” describes pain felt along the inner edge of your shin bone. Shin splint pain concentrates in the lower leg between the knee and ankle. Your doctor may refer to the condition as medial tibial stress syndrome (MTSS).