Frown lines, i.e. frown lines between eyebrows, can be eliminated with the help of botulinum toxin injections, hyaluronic acid fillers, radiofrequency treatments, surgical treatments and other methods. 1. Botulinum toxin injection: Botulinum toxin injection is commonly used in the treatment of dynamic facial wrinkles, with precise efficacy. Its principle is to inhibit the contraction of some of the frowning muscles by interfering with neuromuscular junction conduction, so as to achieve the effect of improving the frown lines, and the commonly used botulinum toxin injection in the clinic is Type A. 2. Hyaluronic acid filler: Hyaluronic acid filler belongs to one kind of local filler treatment, and its main ingredient, hyaluronic acid, has good water-absorbent property, which can absorb water from the skin surface and the deeper layer, thus helping patients to fill the grooves produced by the frown lines, and to achieve the effect of lightening the frown lines between the eyebrows. 3. Radiofrequency treatment: radiofrequency treatment can also be used to treat the patient’s frown lines, which is mainly through the emission of high-frequency electromagnetic waves and its heat conduction, stimulate the skin dermal collagen fibers and elastic fibers contraction regeneration and reorganization, so as to achieve tightening of the skin, fading wrinkles effect. 4. Surgery: For patients with more obvious forehead frown lines and loose skin, surgical treatments such as inter-brow wrinkle removal can be tried to help lighten and eliminate frown lines. It should be noted that the above treatments need to be carried out under the guidance of specialists in regular medical institutions to avoid the occurrence of adverse reactions.