Some times when capsaicin is applied to the skin it can cause a burning, stinging, redness and even a rash. Most often this rash is more irritation than anything and well get better after the first few uses. If the rash persists though you should stop the use as you may have an allergy towards capsaicin. Also capsaicin should never be applied to broken skin. Remember to where gloves if you're working with a higher concentration and don't touch your face, if you don't where gloves be sure to thoroughly wash your hands before making contact with your face.
Another very interesting alternative cancer treatment is Ukrain™. Formulated by Nowicky Pharma in Vienna, Austria, the anti-cancer drug is a semi-synthetic proprietary product which is an alkaloid extract from Chelidonium (common name Celandine). The medication is said to contain more than 40 alkaloids and is quickly absorbed by cancerous cells leading to rapid cancer-cell apoptosis. Primarily, it is given through IV as an alternative to chemotherapy for cancer patients and also has reported success with HIV and hepatitis patients.
Another well know spice in the kitchen cinnamon is also known for it's medicinal properties. While not really an herb I still think it's important to list it in our list of herbs and their uses. Cinnamon actually comes from the inner bark of a tree in the laurel family. It's been used for centuries and was a hot commodity for trade in ancient times. In fact during the first century A.D. in Rome cinnamon was 15 times more expensive than silver. The Chinese were probably the first to use cinnamon as a medicinal herb and used it to treat fevers, and diarrhea. In more modern times cinnamon has been found to stabilize blood sugar levels in diabetics, as it has an insulin kind of effect.