Frown lines can be caused by excessive and recurrent facial emotions, such as frowning. Frown lines could become permanently carved into the skin if they aren't addressed as soon as they begin to appear. Frown lines become more prominent as a result of sun exposure and age. Botulinum toxin treatments or a forehead lift operation can, however, remove them. Even if a facelift is a long-term success, it's impossible to know exactly how you'll appear afterward.