Does the emission of a viscous fluid, which the questioner was unable to distinguish from semen, pre-seminal fluid (madhy), or post-urination fluid (wady), after urination necessitate a ritual bath (ghusl), especially since he masturbated the day before and suffers from obsessive doubts (waswasah) concerning purity?

Masturbation is forbidden, and one must hasten to repent from it. It appears that the fluid discharged is madhi (pre-seminal fluid), as it was discharged during the day without lust or gushing. Therefore, only ablution (wudu') is required, along with washing the affected area and whatever it touched. If one is uncertain whether it is madhi or mani (seminal fluid), they may consider it madhi and perform ablution. Even if it were mani, it would not necessitate another ghusl (ritual bath). We advise prayer and supplication to avoid obsessive thoughts.