[Pest] fleas [Preferred body part] prefer ankles and bare feet [Reaction] May make red itchy welt; several days. Later bites are less severe. [Felt at time of bite] 
usually
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 .