Lemon balm (Melissa officinalis) is a herbaceous perennial plant that is native to Europe, North Africa, and West Asia. Its part of the mint family (Lamiaceae). 
 
Typically grows to a height of 30-70 cm  and has a bushy, upright growth habit. The leaves of lemon balm are ovate or heart-shaped, with a slightly wrinkled texture, and have a bright green color and emit a strong, lemony scent when crushed.
The stems are square-shaped and are also slightly hairy. Lemon balm produces small, white or yellowish flowers that are arranged in clusters on the tips of the stems. The flowers bloom in the summer months and are attractive to bees and other pollinators.
 
Lemon balm is known for its calming effects and has been used traditionally to relieve anxiety and stress.
 
Lemon balm has sedative properties and has been used as a natural sleep aid. 
 
Lemon balm has been used as a digestive aid to relieve indigestion, bloating, and gas. Cold sores:
 
Lemon balm has antiviral properties and has been used topically to treat cold sores. 
 
Lemon balm has been shown to improve cognitive function and memory.
 
Lemon balm has been used traditionally to relieve menstrual cramps and other menstrual symptoms.
 
Lemon balm has been used as a natural insect repellent, particularly against mosquitoes. as it contains citronellal. citronellal is a terpene that gives lemon balm its lemony scent and has insect-repelling properties.
 
Lemon balm has been used topically to treat skin conditions such as acne, eczema, and psoriasis.
 
Lemon balm has been shown to have a beneficial effect on blood pressure and has been used to help manage hypertension
 
With any herbal remedy, it is important to consult with a healthcare professional before using it for medicinal purposes, especially if you are pregnant or taking other medications.