There are several private clinics in the capital of Tunisia and its tourism centres that are of an international standard. Public healthcare is mostly functional in the larger cities, but often suffers from lack of resources.
Private clinics operate in a similar manner to hospitals and can perform several different operations. The range of special healthcare services may be limited. The international clinics have English-speaking doctors, but the rest of the personnel often speak only Arabian or French, especially in public healthcare. Ambulance services are limited outside of the cities. There are many pharmacies, and the contact information for the pharmacy on duty can usually be found on their doors or windows.
In Sousse, some hotels have their own doctors who perform house calls when necessary. The private clinic of Les Oliviers in Sousse, for example, is on call 24 hours a day. The private clinic Polyclinique Hammamet operates in Hammamet.
More information concerning the prices of public healthcare is available in French on the website of the Tunisian Ministry of Health. You should confirm the prices again on site.
Travellers to Tunisia should purchase comprehensive travel insurance. However, healthcare service providers will often require advance payment in cash. Most locations will not accept promissory notes from Finnish insurance companies and only some locations will accept credit cards.
Sources: Ministry for Foreign Affairs of Finland, U.S. Department of State: A service of the Bureau of Consular Affairs, Allo Expat, The World Travel Guide