My Asus Zenfone 4 selfie battery bloated unexpectedly. ls it normal to all the asus phone?

[sofiabalaoro13]

Please tell us some basic information before asking for help:
Model Name: Asus Zenfone 4 selfie
Firmware Version:
Rooted or not: not
Frequency of Occurrence:
APP Name & APP Version (If your issue relates to the app):
In addition to information above, please also provide as much details as you can, e.g., using scenario, what troubleshooting you've already done, screenshot, etc.
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I bought this phone 3 years ago. And now, I notice that the battery is bloated. And the side of my screen already popping out due to the bloated battery. Is it normal to all the Asus phone? How much will it cost me if I want to replace the battery? Thank you.

[Christine_ASUS]

Hi sofiabalaoro13
Thank you for your asking. To check your battery health, please try some stay-at-home troubleshooting tips below:
1. Enter "Safe Mode" and leave a 100%-charged phone in sleep(idle) mode in a night, then provide me the screenshot of 
①Setting>Battery
②Setting>Battery>3 dots on the top"Show app usage"
# How to enter and exit "Safe Mode"
https://www.asus.com/support/FAQ/1005163/
If the battery works well in "Safe Mode", please check on any disturbance from the installed 3rd party Apps.
2. If the issue remains the same in "Safe Mode", please try "the Factory Reset" 
Settings>System>Reset options>Factory data reset
Please note that once the Factory Reset is completed, all data, apps, settings and personal information will be deleted.
3. Is there any zone heating up while using/idling?

For more information, please refer to the links below
https://www.asus.com/support/FAQ/1009546/
https://www.asus.com/support/FAQ/1009547/