Symptom

Symptoms may be chronic, relapsing or remitting. They also may progressively worsen or progressively become better (convalescence). Conditions may also be classified as symptomatic (present and demonstrating symptoms) or asymptomatic (present but without symptoms). Asymptomatic conditions exist for years undiagnosed and may only be found upon medical testing (such as high blood pressure).Constitutional or general symptoms are those that are related to the systemic effects of a disease (e.g., fever, malaise, anorexia, weight loss). They affect the entire body rather than a specific organ or location.

The terms "chief complaint", "presenting symptom", or "presenting complaint" are used to describe the initial concern which brings a patient to a doctor. The symptom that ultimately leads to a diagnosis is called a "cardinal symptom".

Symptom versus signA symptom can more simply be defined as any feature which is noticed by the patient. A sign is noticed by other people. It is not necessarily the nature of the sign or symptom which defines it, but who observes it.

A feature might be sign or a symptom, or both, depending on the observer(s). For example, a skin rash may be noticed by either a healthcare professional as a sign, or by the patient as a symptom. When it is noticed by both, then the feature is both a sign and a symptom.

Some features, such as pain, can only be symptoms, because they cannot be directly observed by other people. Other features can only be signs, such as a blood cell count measured in a medical laboratory.

Symptomatic treatment

is any medical therapy of a disease that only affects its symptoms, not its cause, i.e., its etiology. It is usually aimed at reducing the signs and symptoms for the comfort and well-being of the patient, but it also may be useful in reducing organic consequences and sequelae of these signs and symptoms of the disease. In many diseases, even in those whose etiologies are known (e.g., most viral diseases, such as influenza), symptomatic treatment is the only one available so far.

Examples of symptomatic treatments:

• Analgesics, for pain
• Anti-inflammatory agents, for inflammation caused by arthritis
• Antitussives, for cough
• Antihistaminics, for allergy
• Brain shunts, to alleviate hydrocephalus

When the etiology for the disease is known, then specific treatment may be instituted, but it is generally associated to symptomatic treatment, as well.

Symptomatic treatment is not always recommended, and in fact it may be outright dangerous, because it may mask the presence of an underlying etiology which will then be forgotten or treated with great delay. Examples:

• Low-grade fever for 15 days or more sometimes is the only symptom of bacteremia by staphylococcus bacteria. Suppressing it by symptomatic treatment will hide the disease from effective diagnosis and treatment with antibiotics. The consequence may be severe (rheumatic fever, nephritis, endocarditis, etc.)
• Chronic headache may be caused simply by a constitutional disposition or be the result of a brain tumor or a brain aneurysm.

Finally, symptomatic treatment is not exempt of adverse effects, and may be a cause of iatrogenic consequences (i.e., ill effects caused by the treatment itself), such as allergic reactions, stomach bleeding, central nervous system effects (nausea, dizziness, etc.).