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Histamines are the culprits behind all those pesky allergy symptoms, like itchy, watery eyes, runny nose, scratchy throat, and sneezing. Below, docs share *all* the possible side effects you might ...

Typically, mold is not harmful, but exposure to high levels can cause symptoms that mimic a common cold. Mold can also trigger allergies or asthma symptoms in some people. Molds are microscopic ...