It is considered asymptomatic (or subclinical) if the patient is a carrier of disease or infection but does not exhibit the normal, noticeable symptoms typically associated with the disease or infection.

Predisease Predisease is a subclinical or prodromal vanguard of a disease. Prediabetes and prehypertension are common examples

Subclinical diabetes is characterized by a fasting blood glucose level of between 5.6 and 6.4. It can be treated by following a low glycemic index diet.

Asymptomatic subclinical infection are those infections which don't show any sign symptoms of infection like pain, swelling, fever or rise of local temperature, usually these infections are countered by body immune system. These infections are diagnosed during investigations for other health problems.

Some patients report weight gain with subclinical hypothyroidism. Although the T4 is normal in subclinical hypothyroidism by definition, some patients report symptoms with only the elevated TSH.