Pulmonary Embolism Support Group
By far the most common form of pulmonary embolism is a thromboembolism, which occurs when a blood clot, generally a venous thrombus, becomes dislodged from its site of formation and embolizes to the arterial blood supply of one of the lungs. Symptoms may include difficulty breathing, pain during breathing, and more rarely circulatory instability and death.

It has been reported that pain from the head, neck and/or shoulders can refer/ radiate to the head regions resulting in a headache. Myofascial trigger points have been identified as a potential cause of this pain which can lead to tension type headache.A myofascial trigger point is a hyper-irritable area within a band of taut muscle (Fernandez-de-las-Penas 2006). It is painful on palpation (with moderate pressure) and can lead to a referred pain distribution.
Latent trigger points are present in the healthy, non-symptomatic individual and may not be an immediate source of pain – in other words there is a trigger point present but it is not causing a pain complaint. However at times they can lead to restricted range of movement and other muscle dysfunctions such as reduced control/ strength and fatigue.
An active trigger point presents with clinical symptoms including local pain, referred pain and muscle dysfunction – in this case the trigger point is causing a pain which may cause the sufferer to seek treatment. Such active trigger points in the neck and shoulder muscles have been associated with the referred pain patterns observed in those suffering from tension type headaches.
Trigger points may be at different places in both skeletal muscles in the hip, neck, shoulder, ... they are usually in places where nerves connected the muscle fibers
A Trigger Point (TrPt) is a hyperirritable spot associated within a taut band of a skeletal muscle that is painful on compression or muscle contraction , and usually responds with a referred pain pattern distant from the spot.