Loulou,
Sometimes trigger points can cause some really odd an annoying symptoms too.
I'll post a link to a chart with some click able links that show the referred pain & sx of some TrPs.
The link is from the pressure pointer website - it has good info for use -- actually a tennis ball, or any other ball, or things around the house - or a willing friend that will help with the treatment is a good thing.
Or a pro PT if you find really stubborn TrPs - or the ones in the neck muscles are tricky because of the location to the main arteries & some delicate bones in the neck..

http://www.pressurepointer.com/pain_reference_chart.htm
user guide-
http://www.pressurepointer.com/Users1.htm


SCM-
[SCM Trigger Points can affect the inner ear, causing balance problems such as dizziness, fainting, staggering, or even falling. There can also be hearing loss and ear pain.

Finally, SCM Trigger Points can cause eye problems such as drooping eyelids, watery eyes, and reddening.]

I get a very watery eye on the right side when my SCM gets tight.