What do you mean by disease symptoms? Explain giving two examples?

When the functioning or the appearance of one or more systems of the body will change for the worse, it gives certain abnormal signs of the disease. These visual changes in human beings are called symptoms. Symptoms give indication of the presence of a particular disease. 

Example (i) Lesions on the skin are the symptoms of chickenpox. 

Example (ii) Cough is the symptom of lung infection.

Disease symptoms are evidences of presence of diseases. Symptoms are in the form of structural and functional changes in he body or body parts.They indicate that there is something wrong in the body e.g. wound with pus, oedema, cough, cold, loose motions, pain in abdomen, headache, fever. However symptoms do not give any exact cause of the disease. For instance, headache may be due to some dozen different diseases. There may be problem of eye sight, blood pressure, some sort of stress(such as of examination, meanigitis, pollution, etc).

Symptoms of the disease are the manifestations or evidences of the presence of disease(s). These indicate that there is some abnormality in the body.
Examples. (i) Cough and breathlessness are symptoms of lung infection.
(ii) Yellowness of sclera (white portion) of the eye and skin are symptoms of jaundice.