It's not as harmful as many people think. Small outbreaks of mold aren't likely to cause any issues and you could easily live with them without any issues at all. This doesn't stop many people from finding mold to be understandably ugly and a horrible sight in your home. While small spots usually aren’t a cause for concern, larger spots of mold can be an issue. They can lead to wheezing, itchy eyes/skin along with a stuffy nose. It can also trigger asthma symptoms and large-scale exposure can lead to fever and shortness of breath in healthy people. There have been links to it causing some neurological symptoms such as memory loss but they are unproven at this point. While household mold is unlikely to cause long-term health issues, it’s not something you want in your home.