Acute illness develops quickly, is intense or severe and lasts a relatively short period of time.
Any condition—e.g., cough & cold, flu, infection, trauma, fracture—with a short (often less than 1 month) clinical course. Acute illnesses usually respond to therapy; a return to a state of complete—pre-morbid—health is the norm.

A chronic condition is a human health condition or disease that is persistent or otherwise long-lasting in its effects or a disease that comes with time. The term chronic is often applied when the course of the disease lasts for more than three months. For example:
Hypertension, Diabetes Mellitus, Osteoporosis, asthma, frequent migraines, consistent back pain, heart disease, kidney disease. The Glow medical center offer a consultation, all laboratory tests, radiology studies (eg: X-RAY, MRI, CT SCAN, U/S, MAMMOGRAPHY …. etc.) also a management for acute and chronic illness and close follow up specially for chronic illness.