Extreme burning pain in 75 y/o woman esophagus. Has Haitius hernia and takes meds for it. Was in apartment with open Crystal drano for a few weeks and noted irritation before this was noticed and addressed. also has myasthenia gravis and taking mestanon. Both of these problems (MG and HH) have existed for several years with no problems. The extreme burning pain started about 3 months ago around time air quality in apartment seemed to become worse (presumably from the drano). Has been out of apt for several weeks now but not sleeping well and not getting better.