A cough is basically a reflex action so the airways can be cleared of phlegm, mucus and other irritants like dust and smoke. An inflammation of the upper respiratory tract due to a virus could also cause a cough.

Coughing can be symptomatic of many conditions including bronchitis, asthma, the common cold, flu, whooping cough or smoking. There are even some prescribed medicines that can cause coughing such as ACE-inhibitors which are used to treat heart failure.

Sometimes a cough can be a symptom of an underlying serious medical condition such as heart failure, lung cancer, tuberculosis, pneumonia or a pulmonary embolism (which is a clot on the lung). Coughs that have been caused by things like flu or the common cold normally disappear after a few days, but coughs that have been caused by an infection of the lung, such as bronchitis, could persist for several weeks, even after the infection has cleared up and this is due to the inflammation of the airways which usually take a while to clear up.

Cough Mechanism and Receptors

If someone has been suffering from a cough for more than a couple of weeks after having a viral infection, they should go to their doctor for medical advice.

Diarrhea can simply be defined as loose, watery stools. People are classed as having diarrhea if they pass such stools more than three times a day. If somebody has acute diarrhea, the problem usually persists for a couple of days only and then clears up of its own accord. On the other hand, if an individual suffers from prolonged diarrhea, meaning more than a couple of days, it could be symptomatic of a more serious problem, as well as posing a risk of dehydration. Dehydration is especially dangerous in young children and the elderly and as such should be treated immediately to help avoid any future potential health issues.

Diarrhea

Individuals of any age can get diarrhea and you may be surprised to find out that the average in developed countries will have a bout of acute diarrhea approximately four times per year. Acute diarrhea is normally associated with a parasitic, a viral or a bacterial infection whereas a chronic diarrhea is typically related to some sort of functional disorder like irritable bowel disorder.

Some other causes of the condition include food intolerances, a reaction to certain medicines, and intestinal diseases such as Crohn’s and celiac disease. Diarrhea can be accompanied by abdominal pains, cramps, nausea, bloating and an urgent overwhelming need to use the toilet.

More often than not, the only treatment required for diarrhea is the replacement of lost fluids. There are some medicines available that can stop the condition, but these aren’t recommended for individuals who have diarrhea caused by a parasitic or bacterial infection. This is because if you stop the diarrhea before the bacteria or parasite is removed from the intestines they will be trapped there prolonging the problem.

Sciatica refers to any pain or compression of the sciatic nerve.  The sciatic nerve runs from the back of the pelvis and right down through the buttocks and both legs and ends at the feet. If something presses on the sciatic nerve it can cause a pain that runs from the lower back and down the leg; this pain can be mild to severe.

Sciatica

Causes of sciatica include slipped discs which can get temporarily moved out of place and then press on the sciatic nerve.  Acute sciatica is pain which lasts up to six weeks whereas chronic sciatica lasts longer than six weeks. Most cases clear up unaided but using painkillers, hot or cold compresses and exercise can help to alleviate symptoms. Sometimes there is a need to contact a physiotherapist especially for chronic sufferers.

Sciatic pain is different to back pain in that it also affects the legs.  Sciatica can cause weakness in the legs or feet. There is a rare condition which can cause sciatica and this is called Cauda Equine Syndrome.  This can lead to paralysis if left untreated as it can permanently damage the nervous system.  A sign of cauda equine syndrome is the sudden loss of bladder or bowel control and if this occurs immediate medical help should be sought.

Another cause of sciatica has been put down to general wear and tear.  This is why people over forty with jobs involving a physical activity are more prone to sciatica.