My iPhone gets very hot when charging

Some activities such as charging or a lot of computational activity (e.g., video), generate heat. Some warmth is to be anticipated.* Read this article about keeping your iPhone, iPad, or iPod touch within acceptable operating temperatures - If your iPhone or iPad gets too hot or too cold - Apple Support

Changes in software such as upgrades may introduce new features which may add to power drain and heat generation. Check Settings > Battery to see if there are apps running that use a lot of power. If there are, decide if you can turn off a service such as Settings > General > Background app refresh when an app is in the background, or Settings > Privacy > Location Services. Read this support article to learn about the battery health feature —> iPhone Battery and Performance - Apple Support

If you think there is a problem with a device, have Apple inspect it. Go to this page to find your nearest Apple Authorized Service Provider (AASP) or Apple Authorized Distributor (AAD) --> Find Locations

How to make a Genius Bar appointment

1. Go to Genius Bar Reservation and Apple Support Options - Apple

2. Go to "Get hardware help".

3. Select your hardware and continue selecting options requiring replacing parts until you see "Bring in for Repair"

4. Sign in with your Apple ID

*"Your iPhone might get slightly warmer while it charges." - from: How to use your MagSafe Battery Pack - Apple Support

muneim Said:

"My iPhone gets very hot when charging: My device become very hot when i put it on charge"

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Troubleshooting an Overheating iPhone:

Perform the following:

I. Cool Down the iPhone:

For a few hours, perform the following...

• Power Off: the iPhone for a bit
• Unplug: any Cables
• Place it Atop: a Laptop Cooler
• Keep it in: an open space
• Keep it Out of: direct sunlight

then...

2. Clear Space Using my User Tips:

See if you need to clear lots of space. System resources may be using up too much services, making it overheat. Internal storage cannot be upgraded. It is what it is. So, the maximum internal storage capacity never increases, even if you upgraded your iCloud plan. Learn More here: What's the Difference Between Device Storage and iCloud Storage? Apple Support

So, what to do...

Clear Space, Using my User Tips:

• How to Clear Space from your Mobile Device, and What to Clear: - User Tip.
• How to Clear "Other" in your iPhone's Storage - Use Backup - User Tip.

"Keep your iPhone, the power adapter, and any wireless charger in a well-ventilated area when in use or charging."**

**Section about "Prolonged heat exposure" in this support article --> Important safety information for iPhone - Apple Support