Definitely go see the doctor on this one, even if you have to pay cash. Tick bites only itch or burn with a rare allergy to tick saliva. Some spider bites can do a lot of damage. Whether it is a tick or spider, he most likely needs antibiotics. Believe me, he does not want any tick borne diseases or necrotic tissue, especially without insurance.
SPIDER BITE..GET IT LOOKED AT SOONER THAN LATER. SOME CAN BECOME NECROTIC WITH TISSUE DAMAGE.and he may need antibiotics.