Is it necessary to perform ghusl after dreaming of engaging in masturbation, while having ceased and repented from it, and are there means to get rid of its psychological and physical effects?

Seeing masturbation in a dream does not necessitate ghusl unless semen is discharged. As for getting rid of the habit of masturbation, it is done through sincere repentance, supplication, and persistence, and fasting for those who cannot marry, for it is a shield for them.