Nervousness thats starts around the buttocks and moves to the stomach and in then shaking of the legs, nausea what could cause this? mostly at night.

Unclear: I would definately call PCP and have a full Physical Exam

Neurology Consult...: 26 y/o says Nervousness that starts around the buttocks and moves to stomach and then shaking of the legs, nausea what could cause this? Mostly at night. Anxiety disorder could be a problem but the possible 'marching' from the buttocks on - and the shaking of legs suggest that some form of partial Seizure Disorder be considered. One should consider seeing a Neurology Consult also for evaluation.

Nocturnal symptoms: Is the leg shaking purely involuntary or can you stop it? It may be a variant of restless leg syndrome or a partial seizure disorder. I recommend consulting a neurologist for evaluation.