Melissa has been shown to calm the nervous system. This herb tea is of particular value in the treatment of agitation, nervous digestive complaints, sleeping problems, melancholy & grief. An infusion of lemon balm has an anti-viral action & is extremely effective against the herpes virus, especially the herpes simplex which produces cold sores. For this, the herb is best used in the early stages of infection. SAFETY- Avoid when thyroid function is low.