It's dangerous. Taking steps to eliminate active mold growth makes the situation even worse. The active growth of mold on walls, papers, wood, or any substance also releases spores when activated. Therefore, when cleaning mold, you run the risk of breathing air full of scattered mold spores.
Make sure that you have identified all areas of mold and their source before you start cleaning. While the serious health effects of exposure to black mold are enough to prevent you from eliminating it yourself, it's not the only reason to call in a team of experts to treat a mold infestation in your home. Removing mold yourself isn't a good idea if you're not sure of the source, can't find the source, or don't know how far the infestation has spread. To eliminate mold growth on hard surfaces, use commercial products, soap and water, or a bleach solution of no more than 1 cup of household linen bleach in 1 gallon of water.
Calling on a professional team to handle the removal of black mold can be a daunting task, especially if you're concerned about the costs of remediation. Black mold is toxic, so it's often safer to ask professionals to remove it, especially if people in the household have respiratory conditions such as asthma or allergies. It's also not a good idea to try to get rid of mold if you or someone in your household has pre-existing respiratory conditions or immune system problems.