Hello, this is not good for your health, but it is a bit exaggerated to say that it is harmful. Because there is no sunlight, the room is very humid and cold, and such an environment is easy to breed bacteria. Living in this environment for a long time is easy to get sick. It is a fact that there is no sunshine. Try to bask in the quilt for a period of time every week, clean the indoor sanitation every week, keep the indoor clean and dry, and minimize the breeding of germs. I hope it is useful to you, and I hope to adopt it ~