What would a bat bite look like and would you notice it?

Possibly: If a human had some allergic sensitization to the mammalian proteins from bats, a bite might itch. However, bat bites are often unnoticed, and because of that, the CDC recommends that any individual that wakes to find a bat in the sleeping room should probably undergo rabies immunization, unless the animal can be captured and submitted to the health department to be tested for rabies [and tests n]

Might not: We treat people for bat bites if one has been in the room with you. Not sure why you are asking this question, but usually it is for concern of rabies. You should probably see a physician to be evaluated if the above scenario applies.