It sounds like a made-up disease or something out of Black Mirror, but iPhone Touch Disease is real for some iPhone owners. If your iPhone is behaving strangely and you think you have this problem, this article will help you understand what's going on and how to fix it.
What You Need to Know About the iPhone 6's 'Touch Disease' (Apple Byte Extra Crunchy Podcast, Ep. 52)
According to Apple, the iPhone 6 Plus is the only model affected by iPhone Touch Disease. There have been some reports that the iPhone 6 is affected, but Apple has not confirmed these.
There are two primary symptoms of the disease:
This is debatable. According to Apple, the condition is caused by repeatedly dropping the iPhone onto hard surfaces and "subsequently placing further stress on the device" (whatever that means; Apple doesn't say). According to Apple, it is essentially the result of the user not taking proper care of their device.