Dull throbbing or sharp pains on the left side of your head can affect your left temple, top of your head, or base of your skull. Left side head pain can be caused by lack of sleep, feeling hungry, being under stress, or irritated nerves in your head. Even though sharp stabbing pains on the left side of the head can be debilitating, they are rarely a sign of anything serious.

Do you have sore legs for no reason and are puzzled why you have leg pain when walking or resting? Sore hamstrings, tight calf muscles, or pain behind your knee can affect your quality of life. Throbbing leg cramps, stiff muscles, aching pains, or tingling down one leg are all types of pain associated with sore legs.

Doctors test for white blood cell (WBC) count to measure the number of white blood cells in your body. This blood test is usually done as part of a standard complete blood count (CBC) test. White blood cells are also called leukocytes and they are part of your immune system. They attack germs, bacteria, and microbes that can cause infections or inflammation. White blood cells can be divided into five main types: neutrophils, lymphocytes, monocytes, eosinophils, and basophils.

Coughing up green or yellow mucus usually means that you have some kind of a respiratory infection caused by a virus or bacteria. A yellow or greenish sputum is typical of the flu, bronchitis, sinusitis, or chest infection. Coughing up thick phlegm that is dark yellow or thick green can mean that the irritation is deep in your airways. 

A swollen cheek could be a result of a tooth abscess, allergic reaction, or infection. Swelling on one side of your face can make your cheeks look puffy, cause your neck to swell, and even close your eye. Usually, a swollen cheek is nothing to worry about and the swelling should go down when you get plenty of rest. However, cheek swelling on one side or both sides could be a serious medical condition.

Pain in the left armpit (also called axilla) can have a number of causes that can range from a simple sore pulled muscle to enlarged lymph nodes. Because we use our arms so much during the day, pain under the left armpit can affect daily activities. Many people are concerned about left armpit pain because they may worry it is connected to their heart. Or, that a painful lump in the left armpit could be a sign of cancer.

Ear and neck pain can cause a lot of frustration and affect your daily activities. Neck pain behind your ear can be associated with a throbbing headache, a painful ear infection, or problem with your jaw. Pain behind the ear may feel like a constant dull throb at the back of your head or you could experience sharp, shooting pains from your neck to your temples. Ear and neck pain can also cause swelling, tenderness, and stiffness behind your ear and down your neck.

Right side head pain can cause dull aches on one side of your head or sharp, stabbing pains behind your right eye. Right-sided headaches can be anything from a mild inconvenience to debilitating head pain that affects your daily activities. Stress, tiredness, tight neck muscles, or sinus infections can all cause pain on the right side of your head.

Coughing up brown or black mucus is never a pleasant experience. The color of coughed up mucus can tell a lot about your health, especially if it is rusty-colored or black. Usually, black mucus (medical name melanoptysis) is a symptom of irritation or an infection in the lungs. However, there is also a chance that brown or rusty colored mucus is tinged with old blood that is being coughed up with your phlegm. Depending on what is causing the dark-colored mucus in your cough, there could be nothing to worry about or you may need to see a doctor to get the cause of the black mucus checked out.