Tingling Feeling Behind Right Shoulder Blade?

Question by Sarah: Tingling Feeling behind right shoulder blade?
When I sit down for a while, I get this tinglig sensation behind my right shoulder blade. I think it’s a trapped nerve or something but I just wanted to make sure. It feels like it’s tingling but being tickled a wee bit at the same time. It’s annoying.
Thanks for helping!

Best answer:

Answer by Akami
There are many possible causes of tingling:

Remaining in the same seated or standing position for a long time
Injury to a nerve — for example, a neck injury may cause you to feel numbness anywhere along your arm or hand, while a low back injury can cause numbness or tingling down the back of your leg
Pressure on the spinal nerves, such as from a herniated disk
Pressure on peripheral nerves from enlarged blood vessels, tumors, scar tissue, or infection
Shingles or herpes zoster infection
Lack of blood supply to an area — for example, cholesterol (plaque) build up from atherosclerosis in the legs can cause pain, numbness, and tingling while walking (this is called vascular claudication); frostbite can also reduce blood supply and lead to numbness

Other medical conditions, including:
Carpal tunnel syndrome (pressure on a nerve at the wrist)
Diabetes
Migraines
Multiple sclerosis
Seizures
Stroke
Transient ischemic attack (TIA), sometimes called a “mini-stroke”
Underactive thyroid
Raynaud’s phenomenon
Abnormal levels of calcium, potassium, or sodium in your body
A lack of vitamin B12 or other vitamin
Use of certain medications
Toxic nerve damage due to lead, alcohol, or tobacco
Radiation therapy

http://www.nlm.nih.gov/medlineplus/ency/article/003206.htm

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