nervous habit

• fidgetingRestless minor movements
• nail-bitingExtremely tense or anxious
• twitchingInvoluntary muscular contractions
• ticInvoluntary repetitive movement
• restlessUnable to be still

anxious · picking · scratching · pacing · jittery · compulsive · stress · tension · cuticles · bouncing · tapping · drumming · stammering · blushing · sweating · trembling · mannerism · unconscious

• habitshabit, habits, bad habit, study habits, rituals
• smokingsmoking, cigarette, cigar, pipe, lighter
• learned responsesconditioned reflex, classical conditioning, salivation, aversion, avoidance
• emotional responsesfacial expression, tone of voice, temper tantrum, mood swing, silent treatment