my 5 month old is very cranky and just keeps trying to eat his fingers all the time. is this teething? how can i help him.

I think your baby is teething. It causes a lot of discomfort and irritation. You could massage his gums with glycerine twice a day. Also give him sticks of cold carrot or apple to chew on. If he is using a teether you could put them in the freezer and them give him.