Where does Waswaas( bad thoughts) come from in Ramadaan
Question

                If bad dreams are from the Shayateen,
      but the Shayateen are chained during Ramadhan, then how is it that we have bad dreams
      during Ramadhan?
Praise be to Allah.Not all shayateen are chained. Only the leaders or the
    strong ones are chained, which means they could not do in Ramadan the things they used to
    do throughout the year. Let it also be known to you that alqareen, who is the resident
    shaytan, never leaves you no matter where you go. Also there is the evil within every one
    of us. Therefor, all of these factors promote the evil which we see during Ramadan, yet it
    is certainly less than outside Ramadan.