Abstract
Horizontal forehead lines are generally treated with calcium hydroxylapatite (CaHA). Soft hyaluronic acid fillers are the first choice for treating horizontal forehead lines when selecting fillers to treat these lines intradermally. Diluted CaHA can aid in improving the quality of the forehead skin and thereby contribute to reducing the horizontal forehead lines. To further reduce the horizontal forehead lines, botulinum toxin can be used to relax the frontalis muscle, ideally one to two weeks prior to the CaHA treatment. To reduce the horizontal forehead lines, botulinum toxin can be used to relax the frontalis muscle, ideally one to two weeks prior to the CaHA treatment. Fillers placed deep to the frontalis muscle can be considered to induce myomodulation, where by stretching the muscle, it will have a lower basic tonus and muscular activity.
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