There are a lot of things that can alter this answer. The usual time suggested for a permanent wave is about 2 1/2 to 3 months.
However, if you also color your hair, when it is time to re-do that, you most likely will need to have the permanent done then again, as permanent solution removes the color from the hair. Get the perm, then add the color.
Certain medicines will shorten the time a perm will last. When I take my medicine for my lupus the permanent wave only lasts about half the time.
And time does vary in different people as well. So I guess the best answer is that you will have to see what works for you.
However, if you also color your hair, when it is time to re-do that, you most likely will need to have the permanent done then again, as permanent solution removes the color from the hair. Get the perm, then add the color.
Certain medicines will shorten the time a perm will last. When I take my medicine for my lupus the permanent wave only lasts about half the time.
And time does vary in different people as well. So I guess the best answer is that you will have to see what works for you.