Some of the signs and symptoms of RSI or an overuse injury can be any of the following:
Burning, aching or shooting pain
Tremors, clumsiness, decrease to loss of sensation, tingling and numbness
Fatigue or lack of strength
Stiffness and decrease or loss of mobility
Swelling and inflammation over the affected area
Difficulty with normal activities like opening doors, chopping vegetables, turning on a tap, opening jars
Pain or discomfort that initially occurs during the repetitive action and subsides during rest.
Symptoms of RSI may disappear when you stop the aggravating factor or activity. The symptoms may last only a few hours or it may take as long as a couple of days to settle. Unfortunately, over time a minor RSI can turn into a chronic injury which may progress in frequency and intensity if the causative action is continued and injury is left untreated.
Some activities that can increase your risk for RSI are:
Stressing the same muscles through repetition
Maintaining the same posture for long periods of time
Maintaining an abnormal posture for an extended period of time, such as holding your arms over your head
Lifting heavy objects repeatedly
Being in poor physical condition or not exercising enough