Q:

how to know baby is on teething my daughter is sometimes she is very irritate



Hi, we are here to help you :)

Go through Babychakra article link below -
What To expect when your baby sprouts those pearly whites :)

http://www.babychakra.com/learn/1496-teething-101-what-to-expect-when-your-baby-sprouts-those-pearly-whites

there is a teething gel which you can apply if baby is irritated