Teething when starts!

You may find this article helpful - https://sg.theasianparent.com/treatment-for-babys-teething-pain

my baby teething start around end of 3rd month have 2 teeth at 5 month old

https://sg.theasianparent.com/the-go-to-guide-for-your-babys-teething

5 to 6 months old