Welcome to the forum!
Chances are that you have esophageal reflux (GERD), where the food in your stomach is thrown up into your food pipe or esophagus. Another possibility is hiatal hernia, where a portion of stomach herniates into the chest cavity through the diaphragm. Both can cause a discomfort in the chest area, nausea, burning, heaviness etc. Irritation of the left diaphragm due to acidity causing stomach distension or due to the hernia can cause hiccups or belching. Fatty food, alcohol etc too can cause hiccups. In GERD, hiccup is body’s mechanism to prevent choking.
Apart from these kidney problems and other metabolic disorders, cancers, infections, certain mental health problems and brain stroke or injury can cause persistent hiccups.
I think you should discuss these possibilities with your doctor. It is difficult to comment beyond this without examining. A comprehensive investigation is required keeping all the points in mind.
Hope this helps. Please let me know if there is any thing else and do keep me posted. Take care!
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. MedHelp is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.