If the amount is too much, the concentration is too high, or the position is off, problems such as stiff expression and difficulty in opening the eyes may occur. For example, when forehead wrinkles are applied, the eyebrows will droop; when crow's feet are applied, the eyes may be unable to open; when nasolabial folds are applied, the smile may become stiff.

When this happens, the girl can only wait a week or two for the botulinum toxin to be naturally absorbed before she can return to her normal expression!