Symptomatic can mean showing symptoms, or it may concern a specific symptom. Symptoms are signs of disease or injury. They are noticed by the person.
Many conditions and diseases have symptoms. A cough can be symptomatic of an upper respiratory infection.
When someone has the common symptoms associated with a disease or condition, they are considered symptomatic. When a disease exists without noticeable symptoms, the person is asymptomatic.
Taber's Cyclopedic Medical Dictionary. 23rd ed. F.A. Davis Company; 2017. www.tabers.com/tabersonline/. Accessed January 27, 2017.