6 Serious Medical Symptoms

1. Paralysis of the arms or legs, tingling, numbness, confusion, dizziness, double vision, slurred speech, trouble finding words, or weakness, especially on one side of the face or body.

These are signs of stroke -- or a "brain attack" -- in which arteries that supply oxygen to the brain become blocked or rupture, causing brain tissue to die.

Symptoms depend on which area of the brain is involved. If a large blood vessel is blocked, a wide area may be affected, so a person may have paralysis on one side of the body and lose other functions, such as speech and understanding. If a smaller vessel is blocked, paralysis may remain limited to an arm or leg.

2. Chest pain or discomfort; pain in the arm, jaw, or neck; breaking out in a cold sweat; extreme weakness; nausea; vomiting; feeling faint; or being short of breath.

3. Tenderness and pain in the back of your lower leg, chest pain, shortness of breath, or coughing up blood.

These are symptoms of a potentially dangerous blood clot in your leg, especially if they come after you've been sitting for a long time, such as on an airplane or during a long car trip. These signs can also surface if you've been bedridden after surgery.

4. Blood in the urine without accompanying pain.

Kidney Stones or a bladder or prostate infection are common causes of blood in the urine.

5. Asthma Symptoms that don't improve or get worse.

Asthma attacks are marked by wheezing or difficulty breathing. When an attack doesn't improve or worsens, a patient should get emergency care.

If an asthma attack is left untreated, it can lead to severe chest muscle fatigue and death, say Shulman and Birge. Some people with persistent asthma hesitate to go to the emergency room because they've gone so many times before, or they need someone to drive them because they're too short of breath. So instead of seeking care, "They try to hang in there," Birge says, even if they need higher doses of inhalants or have decreasing lung function measurements when using a device to measure how well they move air out of their lungs.

6. Depression and suicidal thoughts.

"Depression can be a very, very serious problem because people can commit suicide," Shulman says. "Some people will not seek care when they are depressed because they think that they'll be perceived as being crazy or not strong or not manly, and they have to understand that there is a chemical imbalance going on in their brain. It is a disease just like any other disease."

Symptoms of depression include sadness, fatigue, apathy, anxiety, changes in sleep habits, and loss of appetite. Depression can be treated with medications and psychotherapy.