RSI is an umbrella term for a collection of conditions affecting the neck,
shoulders, arms, wrists and hands. It can also affect the legs and feet.
If you use your hands and arms a lot, e.g. keyboard use, you get it the in
upper limbs; if you use your legs and feet, e.g. sewing machinist, you get
it in the lower limbs.

RSI is also called by various other names, including:
     *  Occupation Overuse Injury (OOI)
     *  Cumulative Trauma Disorder (CTD)
     *  Work Related Upper Limb Disorder (WRULD)

There are two forms of RSI:

     1. 'Distinct' RSI

        This includes: Carpal Tunnel Syndrome (CTS), Tennis Elbow
	(Epicondylitis), Tenosynovitis, Tendinitis, Bursitis, Thoracic outlet
	syndrome, Cubital tunnel syndrome etc.  Health care professionals who
	deal with RSI tend not to call these conditions RSI but by their
        separate names.

     2. 'Diffuse' RSI

        This is where you get multiple areas of diffuse pain in the
        muscles and other soft tissues. It is due to nerve compression (AND),
        trigger points etc. When health care professionals who deal with
        RSI talk about RSI this is what they are referring to.

You can have both of these types of RSI at the same time and multiple
occurrences at the same time.