Do you have a mobile phone? Do you send text messages to your friends and family?

Text messaging or “texting” is becoming very p__1__. But scientists have p__2__ that texting can give us problems with our h__3__. Be careful! Too much texting can cause RSI (Repetitive Strain Injury) in our thumbs (大拇指) and wrists (腕关节). We spoke to a doctor called Harriet Wilson, who treats many patients with RSI. She says if we spend more than 10-15 minutes texting each time, we could have p__4__ in the future.

Dr. Harjeet Deepa, who treats RSI patients, said that the y__5__ patient she had treated was a 5-year-old girl. She had s__6__ bad RSI in her hands that she couldn’t hold a pencil.

As mobile phones d__7__, they are getting smaller with buttons c__8__ together. Texting with a smaller phone is worse than using a larger phone with b__9__ buttons. Using computers and playing video games can cause the same problem. So more and more people could find t__10_ with RSI.

Many university students and teenagers have RSI. If we don’t do anything about this, too many young people could grow up in terrible pain.