A yaoi where the seme is like a doctor or smthg. I want that the treatments is them doing ...

is it the one where he has like erectile dysfunction? and then goes to a doctor for treatment...

Any will do! I just want a recommendation and read something like that haha. I dont have a specific manga in mind

i have this one I read, honestly it was okay ish but here u go
https://www.mangago.me/read-manga/ore_no_xxx_ga_genki_ga_nai_ken_ni_tsuite/

https://www.mangago.me/read-manga/love_strongly_surprise/

not a doctor but a tattoo artist

smth similar

https://www.mangago.me/read-manga/junho_s_health_check/

not a doctor

https://www.mangago.me/read-manga/boss_it_s_not_a_massage_parlour_ssfujoshi/

Highly DONT recommend this because everything is messy and straight up trash, but you can take a look if you're interested in stuff like that.
https://www.mangago.me/read-manga/virus_yd/

https://www.mangago.me/read-manga/sensei_shokushin_shite_kudasai/