Coughing up blood can mean one of several serious conditions, such as cancer, infection or serious problem with the blood vessels in the lungs, according to WebMD. In most cases, coughing up blood requires medical evalua... More » Health Pain & Symptoms

Coughing up white foam can be a sign of kennel cough, a fungal infection, bloat or bilious vomiting syndrome, according to VetInfo. If a dog has been boarded with other dogs recently, kennel cough is the prime suspect an... More »

While coughing up blood while pregnant can be a common side effect of bronchitis, it can also signify more serious illnesses, such as lung cancer, pneumonia, pulmonary embolism, congestive heart failure, tuberculosis or ... More »

Coughing up blood with mucus is a sign of a medical problem in the lungs or airways. According to MedlinePlus, coughing up blood with mucus can indicate bronchitis, blood clot in the lung, vasculitis, pneumonia, pulmonar... More » Health Pain & Symptoms

Any one of 77 different conditions, including ear canal infection, sleep apnea or post-concussive syndrome may cause a shooting pain in the ear or head, according to WebMD. Other possible conditions include acute stress ... More » Health Pain & Symptoms

Blood in the semen can indicate an infection or inflammation according to WebMD. It can also indicate trauma or occur as a result of a medical procedure. More » Health Pain & Symptoms

Dehydration and overuse of antacids are among the conditions that cause high carbon dioxide levels in the blood, according to WebMD. High CO2 levels are also caused by vomiting, anorexia, chronic obstructive pulmonary di... More » Health Pain & Symptoms