There are definitely some situations that will cause your iPhone to overheat, which you'll want to remedy as quickly as possible; if it stays too warm for too long, it could cause permanent damage, including shortened battery life or even a complete shutdown. While charging, intense usage, and data-heavy setup won't necessarily lead to overheating, it's still a possibility.

Another major factor in iPhones getting too hot is, naturally, the temperature around them, so be mindful of your surroundings and don’t have your device sitting in direct sunlight. You can also deduce that your iPhone is getting too warm if you notice a change in its behavior, such as taking longer than usual to charge or the display dimming on its own or even turning black.

To counteract overheating, first bring the phone’s temperature down by getting it away from whatever heat source is causing the problem — for instance, step into the shade, close out all of your apps, or shut it down completely for a few minutes. It's also important to take preventative measures in advance like not leaving your phone inside a vehicle on a hot day.