When will this moaning end? Is it normal!!?

Karin

My 6 month old will just moan all day every day from the moment he wakes up until the moment he goes to bed. No matter what we are doing, where we are or who we are with he will moan. It's very rare we get a whole hour without him moaning. Is this normal!? Hes my first baby so I dont know if its normal or not. I'm not sure if its teeth? But it's been going on for well over a month now. He used to be such a happy baby. :(