Echinacea has not been scientifically proven to cure acne.
More Info: Echinacea, also known as purple coneflower, is a North American plant belonging to the composite family. Though the evidence is limited, people have long used Echinacea for the prevention of cold, flu, and upper respiratory tract infections. It has also shown promise for immune boosting and anti-inflammatory properties. It has been touted as a treatment for wounds and skin problems such as acne and boils but the evidence has yet to support these claims.
Though there is limited evidence a few natural remedies have been showing promise for the treatment of acne in research studies.
Tea tree oil: Tea tree oil added to gels may be as effective as the same amount of benzoyl peroxide.
Zinc: Because zinc has been shown to improve inflammatory conditions, it is being considered as an alternative acne treatment.
Glycolic acid: Glycolic acid, a natural substance found in sugar cane removes dead skin cells and unclogs pores which could help to control break outs.