From your nerves system and nerves
Answer:
Mood: anxiety, apathy, general discontent, guilt, hopelessness, loss of interest or pleasure in activities, mood swings, or sadness
Behavioral: agitation, excessive crying, irritability, restlessness, or social isolation
Sleep: early awakening, excess sleepiness, insomnia, or restless sleep
Whole body: excessive hunger, fatigue, or loss of appetite
Cognitive: lack of concentration, slowness in activity, or thoughts of ending ones' life.
Weight: weight gain or weight loss
Also common: poor appetite or repeatedly going over thoughts