Tendonitis can be treated with injections, which provide both anti-inflammatory and pain-relieving effects, often resulting in a very satisfactory therapeutic outcome. However, there are some considerations to keep in mind when performing these injections: First, the injection site must be free of infection and dermatitis; the skin must be clean and intact. Second, it is best to avoid injecting the medication near the attachment points of muscles or tendons on bones. In some cases, such as with femoral condyle osteoarthritis, injections near these points are necessary, but care should be taken not to inject directly into the attachment points to prevent tendon rupture at those sites, which are currently irreplaceable with current scientific techniques. Third, do not exceed three tendonitis injections. Many patients may recover after one or two injections, but some might go for a third if they do not feel significant improvement. If there is no noticeable benefit after three injections, or if the treatment is ineffective, the injection therapy might not be suitable for you, and other treatments should be considered. Therefore, while tendon injections can be an option for tendonitis, it is essential to apply the correct methods.