Suggest Treatment For Choking Sensation In Throat

Hello Dr. Chowhan my mother has been suffering for the past three month with a problem with her throat. Whenevr she swallows she said the food gets stuck in her throat and shes choking. This is extrememly frightening for me and my family when this happens to her. She says the only thing that will make it go down is liquid. My mom does have Thyroid and takes pills for this problem. Although shes went to the doctors for this problem I am telling you about but they couldnt find anything wrong she has even took X-RAYS and doctors say the results come back fine. She does not believe everything is fine as she is suffering anytime she eats. Can you please please please tell me what this is that is going on with my mother. I would really appriiciate it. Thanks