Symptoms of muscle tension include muscle stiffness and increased joint tension, pain and trembling. 1. Muscle stiffness and increased joint tension: when there is persistent muscle tension, the muscle surface tension may be high, and the muscle may feel stiff when touched, with increased joint tension and limited movement. 2. Pain: When muscle tension increases, muscle pain may occur. This may be related to muscle spasm, muscle fatigue due to persistent muscle contraction. 3. Tremor: When persistent muscle tension causes muscle fatigue, there is a possibility of muscle tremor over a long period of time. Patients should seek prompt medical attention and formal treatment when symptoms of muscle tension occur.