Endoscopy showed la grade a reflux esophagitis, biopsi came back normal. is this dangerous?

Grade A reflux esophagitis is mild and should heal in a few weeks of proper treatment & lifestyle changes. The endoscopist ( gastroenterologist) who performed your procedure is best to answer your question and advise you.

Although not necessarily dangerous, it does indicate that you do have acid reflux which may need treatment. You should discuss this with your gastroenterologist who did your procedure. Good luck.

Early diagnosis of reflux esophagitis allows you to do something about it like weight loss if you are overweight and to know what you eat that makes the symptoms worse to avoid them; habit that prevent constipation. Your doctor may prescribe medication to alleviate the symptoms but habitual changes would make the symptoms go away eventually and reduce the associated risk of prolonged esophagitis