Is seeing a deceased person sick in a dream with the same illness they died from an indication of something, or are they merely dreams?

Dreams are of various types: some are true visions, some are from Satan, and some are from self-talk or what a person thinks about excessively. If a sleeper sees something that disturbs him, he should seek refuge in Allah, for it will not harm him. It is recommended to consistently recite the remembrances (dhikr) before sleep.