Nicotine withdrawal symptoms may include headaches, anxiety, nausea, and tobacco cravings. These symptoms are a result of a lack of nicotine, a substance to which the body may become addicted. Withdrawal symptoms are the worst about two days after quitting and may last for about six months. While some people quit smoking cold turkey, many look to aids such as medications, patches, gum, and more. These may help ease the effects of nicotine withdrawal. To stay motivated, reward yourself, and don't let little setbacks hinder your overall goal. Follow the links below to find WebMD's comprehensive coverage about how nicotine withdrawal occurs, what its symptoms are, how to treat it, and much more.