In Islam, there is no specific prohibition against crying in the bathroom or any specific harm associated with it. Crying is a natural emotional response, and Islam recognizes the importance of expressing emotions genuinely.
However, Islam does emphasize cleanliness and hygiene, and the bathroom is considered a place for relieving oneself and maintaining personal cleanliness. When using the bathroom, it is essential to follow proper etiquette, such as entering with the left foot, leaving with the right foot, and avoiding facing the Qibla (the direction of the Kaaba in Mecca) while using the facilities.
If you are feeling emotional or overwhelmed and find yourself crying in the bathroom, it is perfectly acceptable to express your emotions and seek comfort in private. Islam acknowledges that people may experience moments of sadness, grief, or distress, and there is no religious harm associated with crying in any location, including the bathroom.
As with any emotional distress, it is encouraged to turn to Allah in prayer and seek solace and guidance during difficult times. You can perform prayers (salah) and make heartfelt supplications (du'a) to find strength and comfort. If you are dealing with significant emotional challenges, consider talking to someone you trust or a religious scholar or counselor who can provide support and advice in accordance with Islamic principles.