Tendinitis is most often caused by repetitive, minor impact on the affected area, or from a sudden more serious injury.
There are many activities that can cause tendinitis, including:
- Cleaning house
- Throwing and pitching
Incorrect posture at work or home or poor conditioning before exercise or playing sports also increases a person’s risk. Other risk factors for tendinitis, include:
- An abnormal or poorly placed bone or joint (such as length differences in your legs or arthritis in a joint) that stresses soft-tissue structures.
- Stresses from other conditions, such as rheumatoid arthritis, gout, psoriatic arthritis, thyroid disorders, or unusual medication reactions.
- Overuse or doing too much too soon when the tendons are not used to a movement or to the task taken on. Tendinitis is common in “weekend warriors,” people that play and exercise hard only on weekends.
- Occasionally an infection can cause tendinitis, especially infection from a cat or dog bite to the hand or a finger.