Neurotoxicity refers to damage caused to the nervous system by harmful substances, known as neurotoxins. These can include chemicals, heavy metals, and certain medications that disrupt normal brain function. Symptoms of neurotoxicity can range from headaches and dizziness to more severe effects like memory loss or motor dysfunction. Common sources of neurotoxins include pesticides, lead, and mercury. Exposure can occur through ingestion, inhalation, or skin contact. Understanding neurotoxicity is crucial for preventing and managing its effects, especially in vulnerable populations such as children and pregnant women.