Signs and symptoms

Hearing, seeing, feeling, smelling or tasting something that is not really there.

A ring shape: either a ring of light seen around lights, or a metal ring fixed to the skull to hold the neck still.

A ring of clear or pale yellow fluid around a central spot of blood when drainage dries on gauze or a sheet.

A crunching or crackling sound heard over the heart in time with the heartbeat.

Pain in any part of the head.

A whooshing or swishing sound heard with a stethoscope, made by blood flowing unevenly through the heart.

A burning feeling behind the breastbone or in the upper belly, often rising toward the throat.

Softening of the lower part of the uterus, felt by the examiner in early pregnancy.

Vomiting blood, either bright red or dark and grainy like coffee grounds.

Passing bright red or maroon blood from the rectum, alone or with stool.

A collection of blood, often clotted, that has leaked out of the blood vessels into the tissue.

Blood in the urine, either seen by eye or found only by a test.

Paralysis of one side of the body.

A transfusion reaction in which the patient's antibodies destroy the donor's red blood cells, most often from blood of the wrong ABO type.

Coughing up blood or blood-streaked mucus from the lungs or airways.

A large loss of blood from a blood vessel, inside the body or out of it.

An enlarged liver.

Thick, dark hair growing in a male-type pattern, such as on the face, chest or back, in a woman.

A rough, strained or breathy voice that is harder to make or sounds different from normal.

Pain in the calf when the foot is bent sharply upward with the knee straight.

A feeling that things will not get better and that nothing a person does can change that.

Small, widely spaced upper front teeth that are narrow at the biting edge, with a notch in the middle.

Bowel sounds that are louder, more frequent or longer than normal when listening to the abdomen.

More physical activity and restlessness than is usual for a person's age, with trouble staying still.

More blood than usual in a part of the body, from more blood flowing in (active) or blood that cannot drain away (passive, or congestion).

Farsightedness: a focusing error in which light focuses behind the retina, so near things look blurry.

Patches of skin that are darker than the skin around them.

Breathing that is deeper, and often faster, than at rest.

Blood pressure that stays higher than normal, at or above 130/80 mm Hg by current US guidelines.

A severe rise in blood pressure, generally to a systolic above 180 or a diastolic above 120 mm Hg.

A body temperature that is higher than normal because the body takes in or makes more heat than it can lose.

Breathing faster or deeper than the body needs, so too much carbon dioxide is breathed out.

Blood in the front chamber of the eye, between the cornea and the iris, often seen as a red layer or clot.

Less active than normal.

A blood glucose level below normal, under 70 mg/dL.

Blood pressure lower than normal, generally below 90/60 mm Hg in an adult.

A body temperature that has fallen below the normal range.

Breathing that is too slow or too shallow to remove enough carbon dioxide from the body.

A level of oxygen in the blood below normal.

A lower than normal level of oxygen in the body's tissues.