Dreams involving loved ones, especially children, can evoke strong emotions and may reflect your concerns for their safety and well-being. Your niece falling off a ladder in your dream might symbolize feelings of vulnerability or anxiety about her health or life circumstances. Ladders often represent progress or the pursuit of goals, so this fall could indicate fears about setbacks or challenges that she might face.

Alternatively, the dream could also reflect your own feelings of helplessness or worry about a situation in your life where you feel someone is at risk or in need of protection. It might be a good time to reach out to your niece or check in with your family, as this could provide reassurance for both you and them.

Consider reflecting on any recent events or changes in your niece's life or your own that may have prompted this dream. It's important to remember that dreams often serve as a way for our subconscious to process emotions and experiences.