DD cracks her jaw

hopkins5

Anyone else's LO do this? It feels/sounds awful! She doesn't grind her teeth but she cracks her jaw all.the.time. Especially if you carry her on your shoulder. She'll put her mouth up against your shoulder and crack away. Gross! I think I'll call the doctor about it to see if I should be concerned, or if there's anything I can do about it. In the meantime, am I alone on this?

This is a P&R by the way. DD is off to swimming lessons, and we'll be back just in time for her nap.