From Discover on Google https://www.insider.com/signs-your-workout-is-hurting-you-2018-5
What is a Trigger Point?
Trigger Points (TP’s) are defined as a “hyper-irritable spot within a taut band of skeletal muscle. The spot is painful on compression and can evoke characteristic referred pain and autonomic phenomena.”1
Put into plain language, a TP is a painful knot in muscle tissue that can refer pain to other areas of the body. You have probably felt the characteristic achy pain and stiffness that TP’s produce at some time in your life.
The serratus anterior muscle is responsible for scapular and rib movement and stability. This muscle can become overloaded from poor posture of the shoulders, as well as heavy breathing from exertion. Trigger points in this muscle will cause pain to be felt under the armpit into the shoulder blade area, and down the arm into the fingers.
the sternocleidomastoid muscles are located in the front of the neck. these muscles are often overworked from prolonged sitting posture. Trigger points in these muscles are a common cause of headache pain.
trigger points are one of the most common sources of pain in the body. Once a trigger point has formed it won’t release on its own. Trigger point massage is one of the most effective way to release a point. It involves using a deep focused pressure applied directly to the knot. This frees the contracted tissue and stimulates healing.
Trigger points are knots of contracted muscle or connective tissue that form as a result of overload stress. Once formed these points will produce pain, refered pain, weakness, and stiffness. Trigger points can also mimic other conditions such as Carple tunnel syndrome and sciatica. Trigger points will on go away on their own, they must be manually released.
The sternocleidomastoid muscles are two strap like muscles located in the front of you neck. They often become overworked from poor sitting posture. Trigger points in these muscles will cause referral pain into the head and around the eye, causing migraine type pain.