What is the interpretation of a person feeling a severe tremor, pressure on the body, and restriction of movement and speech before sleep, and what are its causes? Is there a way to get rid of this state with some adhkar (remembrances of Allah)?

What often happens are nightmares caused by Satan to those who do not seek refuge from him. The sleeper is protected from them by observing the remembrances of sleep (adhkar al-nawm), such as Ayat al-Kursi. It was narrated in the story of Abu Hurayrah that Satan said to him: "When you go to your bed, recite Ayat al-Kursi, a guardian from Allah will remain with you, and no devil will approach you until morning." The Prophet, peace and blessings be upon him, said: "He told you the truth, though he is a great liar. That was Satan." The cause could also be a physical illness, in which case it is advisable to consult a specialized doctor.