My daughter did this since the birth through 5yr old. Turns out she needed her adenoids & tonsils out and had sleep apnea. Her nostrils were 90% blocked. After surgery, slept like a baby ever since. She’s 10.5y now. I would suggest you go to ENT. They didn’t find the issues until they went in the nose with a camera. All the doctors and pediatricians kept telling me that everything was fine and looked normal until the camera revealed everything!
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