feng shui bathroom cures.
Second, since you know that your bathroom is located in the Love and Marriage area (Southwest), do focus on strengthening its feng shui element, which is Earth. Both Fire and Earth element colors are good in the Southwest feng shui bagua area, so you might consider, for example, painting the walls in a luscious red color (Fire feng shui element) or a warm, earthy color (Earth feng shui element.)
In addition to strengthening the energy of the feng shui element of the specific Bagua area, focus on expressing and strengthening the energy the Bagua is connected to. In the case of a bathroom in Southwest, you need to emphasize the energy of love. So, you can, for example, have a beautiful painting of two lovers, or have a composition of two tall candles, surrounded by rose quartz crystals. Or any other images or items that nourish your heart with a feeling of Love.
Speaking of feng shui elements, be mindful about limiting the Metal, Wood and Water elements in your Southwest bathroom. And, of course, do not have art with lonely, single people, not in the Love and Marriage area!
To conclude, it is not that it is "bad feng shui" to have a bathroom in Southwest bagua area, it just that it takes constant attention, or focus, to keep it "in good feng shui shape", so to speak, to keep the energy fresh there. As the energy of Southwest is connected to the feng shui energy of love relationships & marriage, it is important to be aware of the guidelines for the Love area and keep them in mind when creating (and taking care of!) your good feng shui bathroom.