Ive been having a slow version of the sound of rice crispies in the center of my skull, maybe near my ears or just dead in the center. Ive also been waking up with headaches and nausea. Im 35years old, take methadone amd clonazepam for anxiety. Ive had major depression, PTSD, a middle ear infection once, crohns disease and my life is generally stressed. I also used methamphetamine for 16 years and opitaes for 12 years(8years on methadone). My adodoted mom died ofna cerebral hemmorhagge(sp?) and im always in fear of going out like her because of built up stress. Mind you im usually just sitting still, the crackling sound usually stops after 15minutes or so in the morning and sometimes in the evening.