I have allergies. I'm sneezing all the time, and my eyes itch.
I have cold and a sore throat. I get a lot of colds.
I have a bad cough. I'm coughing a lot.
I have a toothache.
I hardly ever get headaches, but I have one now.
I feel sick. I often get sick when I eat shellfish.
I have a stomachache. I often get stomachaches.
I have a fever. I think I'm getting the flu.