A strained tendon may produce the following symptoms: 1. It may cause significant local pain that peaks at the moment of the strain and persists thereafter and may be aggravated. 2. The patient may hear or feel a strange sound, such as a rupture sound at the moment of the strain, which is produced when the tendon or muscle belly is torn. 3, there will be obvious swelling, mainly due to the internal bleeding caused by the strain. The patient is usually reluctant to move the injured limb after the strain, as this will induce severe pain. 5. There may be a decrease in muscle strength, as the strain will lead to damage to the muscle tendons, which in turn will cause a significant decrease in strength around the joint.