1 Spot Early Warning Signs
If you notice any swelling or other expansion damage to your iPhone, you should immediately disconnect it from the charger. Keep it in a well-ventilated place away from flammable materials while you seek help.
When the malfunctioning iPhone isn’t an immediate danger, you could contact Apple Support as soon as possible. Get a hold of them through the internet, or call your local Apple Store and ask for further instructions on how to get your iPhone repaired.