Remember to research the herbs that you are going to use. Make sure you are using them in the right ways and you are not doing anything wrong. Researching the herbs you are going to use is vital because some herbs are very poisonous and can result in death, such as the herb Belladonna. Even common herbs like Cinnamon can have a negative effect on you. Cinnamon can irritate the skin if used in succession. All it takes is a quick search to find out the information about the herb.