Dream about dirty mattress is a symbol for early unpleasant traumas and repressed feelings or memories. Your perception on something is wrong. You are seeking some intimate closeness that is lacking in some relationship. It is a metaphor for fear or uncertainty regarding a relationship. You have made a negative choice in some important matter.
Dirty mattress dream hints a difficult situation that may get your hands dirty. The bad times are coming to an end. You can not afford to lose site of your goal. The dream is a premonition for your anxieties and fears about the surgery, recovery and life after surgery. You may be trying to evaluate a situation and gather information about your environment.
If you dreamt about dirty mattress:
Too much to do around the house could have you running around like crazy. You may need to make a lot of calls, see too many people, or execute some rather tedious paperwork. This could have your nerves on edge by midafternoon, so take a few minutes for yourself every two hours or so. Step outside in the fresh air. This will calm you and help you stay sane.