Is your bathroom floor always wet? Do you smell any strange odors every time you enter your bathroom? In all likelihood, the reason for the smell is stagnant water in your clogged drains. What you need to do is to immediately call up drain cleaning experts in your area and have them de-clog that problematic drain. Other than overwhelming the home with an unpleasant smell, stagnant water can be very dangerous.
According to the World Health Organization (WHO), stagnant water can become the breeding ground of many insects like mosquitos. After the female mosquito lays her eggs (over a hundred at a time), it only takes 10 days for the larvae to become pupae, and shortly after that they will become fully grown mosquitos. In just a matter of 10 days your bathroom can literally be the hub of an army of disease-carrying mosquitos.