Where I can get toothpaste for my 4 month old? And how do I brush her teeth?

You can use toothpaste when your child's first tooth erupts. There are toothbrushes and toothpaste for babies. Try Jack N Jill toothpaste and Pigeon toothbrushes. If she has no teeth yet, just continue cleaning her gums with a piece of wet cloth. You can also use a finger brush that has very soft bristles. http://www.amazon.com/Jack-Jill-Natural-Toothpaste-Strawberry/dp/B00D8W4YZ4 http://www.babycentre.co.uk/a554806/caring-for-your-babys-teeth