As molds grow, some of the spores may produce potentially toxic byproducts called mycotoxins.
  Some of these molds are commonly found in abundant moisture infiltrated buildings along with the warmth for their growing enviromnent. 
Many mycotoxins from common molds have been identified, and many more remain to be identified.  The amount and types of mycotoxins produced by a particular mold depends on many environmental and genetic factors.  No one can tell without testing whether a mold is producing mycotoxins just by looking at it.  Some mycotoxins are known to affect people, but for many mycotoxins little health information is available.  Research on mycotoxins is ongoing.  Exposure to mycotoxins can occur from inhalation, ingestion, and skin contact.  It is prudent to avoid unnecessary inhalation exposure to mold, some people are more sensitive to molds than others. For these people, exposure to molds can cause symptoms such as nasal stuffiness, eye irritation, wheezing, or skin irritation. Some people such as those with serious allergies to molds, may have more severe reactions. Severe reactions may occur among workers exposed to large amounts of molds in occupational settings, such as;  farmers working around moldy hay. Severe reactions may include fever and shortness of breath. Some people with chronic lung illnesses, such as obstructive lung disease, may develop mold infections in their lungs.
 Some people have inhaled enough to go into convulsions and die.
Do not try to deal with a mold problem without the leadership of a remediation specialist. This can result in serious problems for anyone who thinks that mold can not hurt you. You and your family would be much safer letting someone that is responsible and aware of the dangers handle your contamination issues.