What are the problems, after Hair straightening?

The relaxed hair is dry and dull, as if they had lost all spring and all life. They break all lengths, mainly at the junction curly-straightened, but also at the base of the hair, which diminishes the overall volume of hair. There are also problems on the scalp, also too dry and often irritated. There are many treatments for post-straightening, each has its own recipe! In fact, some are effective, others less so. Some may even be negative for the health of hair. But before talking care off, I think we must first understand the changes that the process of straightening was setting, the operation is far from trivial ...