I have never taken retinoids. Reading the posts about retinoids on this forum, I have learned that they are intended to "thin" the skin, and are taken by people with EHK and other rare and severe types of ich that generally do not allow for sweating. Recently, I have read of terrible side-effects---hip surgery, permanent hair loss, etc. Based on what you have said, I surmise that there may have been damages to your sweat glands or pores.
I have never thought of taking retinoids as I could sweat (severe Vulgaris) and no derms have ever broached the issue with me. If sweating was never a problem when you were young, may I ask why you were advised to take the drug years ago?
Don't ever lose hope when
there is a promised land, and "sweat" dreams