Addiction specialists at The Priory say that 'text addicts' have mood swings and even feel sick if they have their phones taken away from them.
The doctors think this is all part of a growing problem of 'behavioural' addictions, which include spending too much time online and on the phone.
It's thought these addictions come from people trying to escape other problems.
Nearly one billion texts are sent each day.
Some teachers have started complaining that texts are damaging your ability to use proper English.
One girl was in trouble with her teachers because she handed in home work written in text-speak, and they couldn't understand a word!
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