Every bad dreams comes from Satan. Our Prophet Muhammad (S.A.W) already told us the steps that dreamer must have to do whenever he sees a bad dream. When someone sees a bad dream he need to spit on his left side three times, ask Allah for shelter from Satan three times and change your side from the side you are sleeping on. If someone sees a bad dream than he need to offer a prayer as soon as possible. If someone has a dream which he dislikes, then he need to remember that such dreams only come from Satan. Dreamer should not tell anyone about that dream, by doing that he will not gain the harm from the dream that he will be going to face. If a dreamer tells someone about his bad dreams than it can be a chance that he will gain some harm. If someone lies about the dream that he did not have than he will gain severe punishment on the Day of Resurrection. Dreams from Satan have no importance and we are advised to ignore them from our Prophet Muhammad (S.A.W). You can prevent from seeing bad dreams by reciting verses from the Quran and duaa’s delivered to us by Our Prophet Muhammad (S.A.W).