Bruising is not typically a symptom of tendinitis, but it can occur if there has been a significant injury to the tendon. If the inflammation is severe or associated with an injury or condition such as tenosynovitis (inflammation of the lining of the tendon sheath around a tendon), there might be visible bruising.
This could be due to blood vessels in or around the tendon rupturing as a result of the strain, overuse, or direct impact.

This site offers information designed for educational purposes only. You should not rely on any information on this site as a substitute for professional medical advice, diagnosis, treatment, or as a substitute for, professional counseling care, advice, diagnosis, or treatment. If you have any concerns or questions about your health, you should always consult with a physician or other healthcare professional.