 [ Symptoms ] hypothyroidism i just had my blood works done and my doctor saw that my calcium levels are slightly above my normal range my potassium has been low for quite some time now as well for the past 5 to 6 years i have been feeling tired intermittently i do not sleep well and when i wake up even with 8 hours of sleep i do not feel rested also i have noticed that i have been having low grade fever i seem to be more sensitive to cold weather i noticed also that i can feel some hot areas on my skin [ Disease ] it is likely that an imbalance in the complex interrelated chemical reactions of the brain involving the neurotransmitters dopamine and glutamate and possibly others plays a role in schizophrenia neurotransmitters are substances that allow brain cells to communicate with one another basic knowledge about brain chemistry and its link to schizophrenia is expanding rapidly and is a promising area of research