Water seeps on the wall next to the bathroom pipes. Is the exterior wall on the left and right sides

In this case, the waterproofing of the upper floor is generally not done, and there is water leaking down through the floor slab along the corner of the wall, which does not rule out the seepage of the exterior wall, and has nothing to do with condensation!

The possibility of condensation is relatively small, and it should be that the waterproofing is not done well.

Focus on these 2 parts of the circle. Dead spots behind wall corners and pipes.

The water seepage wall should be uniform humidity, there are no obvious water droplets, and the wall will peel, the condensate has obvious water droplets and the distribution is also very uniform, touch the water pipe and the wall temperature difference is large, it is the condensation caused by the water pipe, but I judge that the section is upstairs leakage,,, if there is no water in the summer, it is condensation

Personally, I feel that the waterproof layer of the ground upstairs is not in place, and there is a leak in the weak point of the corner, which accumulates into a lot of water droplets.

The source of water may be the shower water on the ground upstairs, the water basin or the interface of the floor drain connected to the drainage pipe may flood into the mezzanine under the floor tiles, or it may be the sealing ring of the stool pit pipe that causes water leakage.

Obvious condensation is not a leak!