If you often feel sick, have a fever, are having issues with your body's general health, or get sick frequently, you should visit a medical practitioner. Among the many conditions that a general practitioner may treat include bronchitis, headaches, diabetes, Sinus, asthma, HIV, infections, allergies, and discomfort. Your practitioner might as well ask you for a FNAC test to find out the possible cause of the problems internally.
Here's a list of top general physicians in general physicians in Kolkata for your reference.