When you dream of a drain, it usually signifies that you are feeling drained and your emotions are being taken advantage of. The drain may be a physical one, such as when you’re tired, or an emotional one, such as when someone is manipulating your feelings. This often happens when you have been carrying emotional baggage and need to let go of it.
The drain in dreams can also mean that you are feeling exhausted and weak. It can also mean that the person who is draining your energy is taking advantage of you – which can lead to you losing everything.