Lemon Balm is thought to be useful as a heart tonic and to help reduce high blood pressure, headaches and migraines. Externally, it is often used on cold sores caused by the herpes virus to shorten the healing time. Please note: we do not diagnose. We simple provide locally grown and tinctured herbal medicines. It is up to you as an individual to do your own research into the healing power, benefits, and risks of nature's medicines.