[Pest] lice [Preferred body part] pubic area or scalp [Reaction] Infested area intensely itchy, with red welts at bite sites. [Felt at time of bite] 
usually not
o f t e n
u s u a l l y
p a i n f u l a n d i m m e d i a t e
u s u a l l y n o t
U s u a l l y n o t ; m a y b e s c r a t c h e d o f f b e f o r e t h e y a r e s e e n .