According to our website, it is best not to use dyes or perms for around 6 months after finishing chemotherapy as hair often becomes fragilised following chemotherapy and it takes about 6 months for it to become stronger. You can find more details about this here.
I would also strongly recommend you have a read of this recent thread and take a look in particular at Moderator Sarah's detailed response as it will will give you a good indication of what possible options are available to you.
