I had burning mouth (tongue) for a few months after I started patch for first time (.05mg). Then it went away. Just as it was I upped my patch to .075 as I started to have breakthrough hot flashes.
Still on .075 and the burning mouth had 98% subsided. I now got a new box of .075, it’s a different brand (Mylan) and my tongue is back on fire noticeably.
Have you had symptom flare ups from brand switch?
My Dr never really identified cause of burning mouth. It it seems very likely it’s hormonal