Nettles are high in minerals and vitamins, too.
The rash that occurs after being stung by nettles happens within minutes of contact.
Stinging nettles are especially good for treating hay fever with its bothersome watery eyes and sneezing.
Evidence of effectiveness is limited; however, nettles have been used to treat hay fever in other countries for years.
If you do not notice a difference within a week, nettles may not work for you.