My son has a rash on his right index finger where he had a bee sting 6 days ago. should i take him to the doctor?

YES: This is a venomous reaction. He must be examined and treated.

Yes: If it is still red , itchy, warm there may be a problem. It may still have the stinger in it, infected, or a reaction that may require other treatment.

Bee sting : It could reaction to bee sting or infection. You can try antihistamine . If finger is sore , swollen then see a doctor.

Getting worse?: If the rash seems to be getting worse (more red or spreading) and is painful then it could be an infection from bacteria getting into the skin through the bee sting. If the infection is serious enough it may need antibiotics. However its not uncommon to have some mild redness, swelling, itching for a few days-week after a bite. So if not severe or worsening then watching + waiting is ok.

Rash: Usually it is a reaction to bee sting. some times can get infecetd, if getting worse and painful-- review with doctor

Yes: Then can determine whether is a bite reaction an allergy or infection. The latter 2 may respond to treatment