Rapid Heart Beat in Cats. Save to mypetMD. Supraventricular tachycardia (SVT) is a medical condition that is characterized by a rapid heart rate that occurs during times of rest or low activity (i.e., at times other than exercise, illness, or stress).
If you chew too much or subconsciously clench your jaws during stressful times, your jaw muscles can spasm and cause pain. Stress-induced clenching or grinding can cause slight misalignment of the jaw, leading to jaw, neck, or eye pain, as well as jackhammer-like headaches.
Stress and Back Pain. There is a strong connection between stress and back pain. Stress causes a release of stress hormones. Stress hormones increase the perception of pain. Stress hormones also cause the muscles to tighten up. The muscles may tense up so much they go into painful spasms. Muscle tension reduces blood flow to the tissues (reduced oxygen and nutrients to the tissues).