Are back pains related to the white discharge that the questioner sees upon waking up from sleep, and does this discharge necessitate Ghusl (ritual bath)?

These secretions do not necessitate ghusl (definition) (ritual bath); only the emission of semen necessitates it. One must be careful not to delay prayer due to obsessive thoughts (waswas), and it is imperative to seek treatment from a trustworthy doctor to get rid of waswas, as it is a widespread evil in worldly and religious matters. As for the relationship between secretions and back pain, doctors should be consulted about that.