Mold is a type of fungi that is present in the environment both indoors and outdoors. It is estimated that there are between tens of thousands to over three hundred thousand different types of mold. While most mold is not harmful, some types can cause serious health problems for people who are allergic to it or who have weakened immune systems.
Mold allergies are the most common type of allergy related to fungi. Symptoms of a mold allergy include sneezing, runny nose, itchy eyes, and congestion. Some people may also experience a skin rash. Mold allergies are usually triggered by exposure to mold spores, which are found in the air both indoors and outdoors.
Mold can also cause serious health problems in people with weakened immune systems, such as those with HIV/AIDS or cancer. People with these conditions are at a higher risk for developing infections of the lungs, skin, and other organs. In some cases, these infections can be life-threatening.
If you think you may be allergic to mold, it is important to see an allergist for testing. There are treatments available that can help to reduce your symptoms and make it easier to live with a mold allergy.
Sources:
https://www.aaaai.org/conditions-and-treatments/conditions-dictionary/mold-allergy
https://www.mayoclinic.org/diseases-conditions/mold-allergy/symptoms-causes/syc-20352784
https://www.webmd.com/allergies/mold-allergy#1