A stress fracture is a small crack in a bone, or severe bruising within a bone. Most stress fractures are caused by overuse and repetitive activity, and are common in runners and athletes who participate in running sports, such as soccer and basketball.
Stress fractures usually occur when people change their activities — such as by trying a new exercise or suddenly increasing the intensity of their workouts. In addition, if osteoporosis or other disease has weakened the bones, just doing everyday activities may result in a stress fracture.
The weight-bearing bones of the foot and lower leg are especially vulnerable to stress fractures because of the repetitive forces they must absorb during activities like walking, running, and jumping.
The most common symptom of a stress fracture in the foot or ankle is pain. The pain usually develops gradually and worsens during weight-bearing activity. Other symptoms may include:
- Pain that diminishes during rest
- Pain that occurs and intensifies during normal, daily activities
- Swelling on the top of the foot or on the outside of the ankle
- Tenderness to touch at the site of the fracture
- Possible bruising
See your doctor as soon as possible if you think that you have a stress fracture in your foot or ankle. Ignoring the pain can have serious consequences. Treatment will vary depending on the location of the stress fracture and its severity. The majority of stress fractures are treated nonsurgically.
A sprained ankle is an injury that occurs when you roll, twist or turn your ankle in an awkward way. This can stretch or tear the tough bands of tissue (ligaments) that help hold your ankle bones together.
Ligaments help stabilize joints, preventing excessive movement. A sprained ankle occurs when the ligaments are forced beyond their normal range of motion. Most sprained ankles involve injuries to the ligaments on the outer side of the ankle.
Signs and symptoms of a sprained ankle vary depending on the severity of the injury. They may include:
- Pain, especially when you bear weight on the affected foot
- Tenderness when you touch the ankle
- Restricted range of motion
- Instability in the ankle
- Popping sensation or sound at the time of injury