RSI is normally associated with office workers who spend hours hunched at a computer keyboard but the condition is becoming increasingly common in children addicted to technological devices and games.
Isabelle's mother Jane Taylor, 40, said her daughter was "constantly" texting on her mobile phone but that it wasn't until she was diagnosed with RSI that the extent of her texting became known.
Mrs Taylor has limited Isabelle's texting to 30 minutes before and after school and her daughter is doing exercises to help her recover from the condition.
Dr David Cosgrave, who treated Isabelle said he sees two children a month with RSI from overuse of gadgets and Tim Hutchful, from the British Chiropractic Association said that text messaging regularly, over a long period of time, could cause repetitive strain which may cause both short and long term injuries.
The Chartered Society of Physiotherapy has issued guidance for mobile phone users on avoiding injury and physiotherapist Bronwyn Clifford of the society said: "Excessive texting and prolonged use of the buttons and dials found on an array of modern handheld gadgets, including MP3s, Blackberry devices and portable games consoles, can contribute to hand, wrist and arm problems."
