This is not new; smart phones can be dangerous to your health on many levels. But the waves sent by our phones are not the only culprits. Indeed, the misuse of a Smartphone may affect your thumbs. Certainly, the opposite finger is necessary for the use of a telephone. And on social networks, more and more people are posting pictures of their thumb that takes a ‘strange’ direction.
According to the physiotherapist Tim Allardyce contacted by the Daily Mail, it could “affect the joints of the thumb in the short term.” Not to mention the consequences in the long term because of wear.
— Lucy Melagof Purnell (@lucypurnell) November 8, 2015
Source: Daily Mail UK