It turns out that many people have had chest pains. Some people think they’re having a heart attack, and more people don’t hear about it. Yes, it can be a sign of coronary heart disease, but it can also be just a trivial chest wall pain, or stomach acid acting up. So, what tests should be done for chest fossa pain caused by GERD? The following is a brief introduction: 1. Endoscopy Endoscopy is the most accurate method to diagnose reflux esophagitis and can determine the severity of reflux esophagus and the presence of complications, combined with biopsy can be differentiated from other causes of esophagitis and other esophageal lesions (such as esophageal cancer, etc.). Endoscopic sighting of reflux esophagitis can establish the diagnosis of GERD, but the absence of reflux esophagitis cannot exclude GERD. Grading of GERD according to the degree of damage to the esophageal mucosa seen endoscopically is helpful in judging the condition and guiding treatment. The long-standing Savary-Miller grading method classifies reflux esophagitis into 4 grades: grade I as a single or several non-fused lesions showing erythema or superficial erosions; grade II as a fused lesion, but not diffuse or circumferential; grade III as a diffuse circumferential lesion with erosions but no strictures; and grade IV as a chronic lesion showing ulceration, stenosis, esophageal constriction, and Barrett’s disease. Grade IV showed chronic lesions with ulceration, stricture, esophageal constriction and Barrett’s esophagus. 2. 24-hour esophageal pH monitoring 24-hour continuous monitoring of esophageal pH with a portable pH recorder under physiological conditions can provide objective evidence of excessive W acid reflux in the esophagus and is now recognized as an important diagnostic method for the diagnosis of GERD, especially when the patient has atypical symptoms, no reflux esophagitis and when treatment is ineffective despite typical symptoms. The normal intraesophageal pH is generally considered to be 5.5-7.0, and when pH <4 is considered to be an indicator of acid reflux, and all parameters of 24-hour intraesophageal pH monitoring are based on this. The following 6 parameters are commonly used as indicators: ① total percentage time of pH<4 in 24 hours; ② percentage time of pH<4 in upright position; ③ percentage time of pH<4 in supine position; ④ number of refluxes; ⑤ number of refluxes longer than 5 minutes; ⑥ longest duration of reflux. Among the 6 diagnostic parameters of pathological reflux, the total percentage time of pH<4 has the highest positive rate, and each parameter can also be combined to determine the total time of reflux according to The total score was obtained by the Demeester scale. Comparing the above parameters with normal values, it can be evaluated whether excessive acid reflux exists in the esophagus. 3.Esophageal barium swallow X-ray This test is not very sensitive for the diagnosis of reflux intuitive inflammation and is performed on those who do not want to accept or cannot tolerate endoscopy, the purpose of which is mainly to exclude other esophageal diseases such as esophageal cancer. Severe reflux esophagitis heat objective finding positive X-ray signs.