Physicians from Port St. Joe to Panama City Beach are treating several cases of sinus problems and respiratory ailments, many caused by red tide.
An apparent outbreak of red tide is blamed for fish kills along the Central Panhandle coastline.
Tuesday, biologists took water samples off Panama City Beach.
Red tide is a natural phenomenon that appears in the gulf every few years.
The tiny, microorganisms in the water prove fatal to fish. It is also responsible for watery eyes and can even trigger an asthma attack.
Doctors say people should not eat fish or shellfish which come from affected waters.
Scientists feel an expected northwest wind later this week will help blow the red tide away from the coast.