Can´t really help with such little information.
All i can say is that keeping it cool will probably help.
What exactly are the symptoms? Also, can you describe the conditions in which you keep it?
On a side note...i see you are italian, and Salamandra salamandra is native to your country. Are you allowed to keep native species? Most european countries have strict laws against it...fines are quite high. Is it WC? because that IS ilegal for sure....
Also, knowing if it´s WC will help clarifying what the problem might be.
Sorry for the speech, but it´s a matter of concern.