Crabby baby

The past few days my one year old has been so up and down. He will be happily playing and then the next minute he is crying and screaming. Some times he will lay on the floor in the dining room and just kick his legs into the floor laughing and then starts crying and screaming a second later. I really dont understand what the problem is. He just had three molars cut through this past week but they're all up through the gums and I dont think he has anymore teeth currently coming in.

The only thing I can think of is maybe hes having growing pains in his legs? I remember getting it as a child and it hurt and wasnt fun.

Does anyone have any thoughts or reccomend anything?