Nic-sick is a term used to describe non-specific symptoms of exposure to nicotine, especially if it is above someones tolerance. Nicotine poisoning can cause nausea, vomiting, headaches, increased heart rate and blood pressure, stomachache, loss of appetite, mouth watering, quick, heavy breathing, and other symptoms. It is typically caused by liquid nicotine ingestion and can lead to overdose and even fatality. Ingesting liquid nicotine is even worse as it is poisonous and can be fatal. Nicotine overdoses are rare, but the advent of e-cigarettes has made "nic-sick" symptoms more common. Nicotine poisoning instances have increased with the introduction of e-cigarettes, with over 200 cases per month in the US. If someone is experiencing nicotine poisoning, it is important to seek medical attention immediately. It is also important to confide in a physician if you use e-cigarettes, as it may save you from misdiagnosis.