What your baby has is called a tongue tie, or a tied tongue. Make an appt with an ENT doctor, or ask your pediatrician to recommend one. The ENT doc will talk to you about the surgery and recovery time for a 5 month old.
My daughter had something similar and I got it snipped at 1 month old, because everything I read said the younger the baby is when you get the surgery, the easier it is. It was a very minor surgery (just a snip) done in the doctor's office with local anesthesia. I read that if I waited until she was older, they might have to put her under general anesthesia, which is more dangerous, and it would take longer for her to recover.View Thread
Please don't take your baby to a chiropractor. If the baby has a damaged neck or spine, you don't want someone who's not a doctor pushing on it and manipulating it. I would take the advice above to switch the baby around in the crib, there may be something he really likes looking at out one side of the crib and if you switch him around, he'll favor the other side.View Thread