Interfrown lines are caused by the joint action of the frown muscle, descending brow muscle, medial orbicularis oculi muscle and the lower edge of the frontalis muscle, or excessive contraction of the frown and descending brow muscles, as well as by excessive water loss, while the content of natural moisturizing particles in the stratum corneum decreases, the skin hydration capacity decreases, and the content of water-lipid emulsions in the skin decreases. The formation of frown lines between the eyebrows can make people look sad and affect the beauty of the face, so how to remove frown lines between the eyebrows has become a concern for many beauty lovers. At present, the best way to remove frown lines is to use Botox. Botox can temporarily inhibit the nerves that govern muscle movement, making the expression muscles stop contracting and eliminating frown lines. Research shows that 80% of the dynamic expression lines can be effectively solved by Botox, so it is the best way to remove dynamic frown lines on the face. When static frown lines appear on the eyebrows, hyaluronic acid injections can be used to achieve a perfect wrinkle reduction. Hyaluronic acid can be injected by way of filler into the dermal folds and depressions, or areas that wish to be plumped up, to achieve the effect of removing wrinkles and modifying the face. Only a very small dose of hyaluronic acid is needed to make these wrinkles disappear without producing a stiff expression or causing any side effects to the body.