Botox results on crows feet simply don't last?

Normally Botox should last for more than 6 weeks. The length of results depends on how the product is applied to that are, and what dosage was used. For example, crow’s feet around the eyes usually take 8 to 14 units on each side. Since your results only lasted 6 weeks you should find out if the solution diluted, how many units were used on each side and was the Botox old? These are important questions you should find out, because it can alter the results

Thank
you for your question. The results of
Botox are dependent upon each individual’s anatomy and muscle use. Either the Botox is not sufficient to relax
the muscles enough to prevent the crow's feet, or the wrinkles are already too
deep and appropriate Botox might not be enough to lift the wrinkles. I recommend a consult with a skilled board
certified cosmetic dermatologist or plastic surgeon.