Vivinavi : Chicago : (United States) Chicago

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My son says his tooth hurts.

Nice to meet you.　Please.

My son, now 22, is training in Europe.　While he was there, he started having a toothache about 2 days ago.　
He is from the US and is taking painkillers because he has no insurance here.　
He is going to Chicago on November 25 for further training.　

I don't know Chicago at all and would like to ask if you have any recommendations for a dentist near Chicago West Loop ？
I did some research and it seems that many Japanese and Japanese American dentists have offices in the north, about 2 hours by train.
He is also a very nice person.　 He did a lot of research on his own last night, but in any case, he doesn't have time to do it because he has to stay up late every day summarizing his training and studying for the next day, so I, his mother, came out to help him.　

I don't think I can concentrate on my work without treatment.　
I am worried what if I go to Chicago and they don't see me after hours.　

Is there such a place for urgent care in such a case ？

Please help me.