Ash ash is an annual herbaceous plant, vitality is very strong, can be grown everywhere, fields, roadsides, wall seams, roofs, and even "garbage heap" can be found on its trail. But its cheap growth does not mean that eating it will get sick, the key is the production process. As long as attention is paid to hygiene in the processing and production, there will be no problem. Where the harvested ash greens should be washed, and to use cold water more than a few times to wash, each time to wash a little longer, and then scalded with boiling water, before they can be used to fry or cold food. The purpose of doing so is to remove the porphyrin substances it contains. If you eat untreated ashwagandha, it can cause solar dermatitis, the parts of the body exposed to the sun will appear swollen, but also cause such as the eyes can not be opened, petechiae, petechiae under the skin, intense burning pain, tingling, itching, and other symptoms, severe blisters, blisters, secondary ulcers and so on. This disease can usually heal itself. Ashwagandha is also a kind of Chinese herbal medicine, has the role of clearing away heat and dampness, stopping itching and penetrating the rash, some people also pounded it coated to cure vitiligo.