Anyone can put him in contact with a doctor.
Well, I would be hesitant to ask a random person on the street. My point being, most Pharmacists (at least in the countries I have visited, can't speak for Germany, never had a medical concern there) are at least familiar with Doctors in the area and based on the need, may be able to direct you to the Doctor that can best help, based on any speciality. Pharmacies are also incredibly easy to find, Doctor's offices tend to be tucked away or non-descript.
It does not apply in this case, but in general, they can be a good source of information; and coming from the US, some things that may require a prescription here, can be dispensed by a Pharmacist without a prescription. But again, not entirely familiar with Germany, maybe Pharmacists are less capable or have more restrictions.