First of all we should try and explain what influenza (flu) is. There are three main types: A, B and C, with B and C only infecting humans and influenza A being able to infect humans, animals and birds. The surface of each influenza A virus contains two types of protein, neuraminidase (N), of which there are nine types, and haemagglutinin (H), of which there are sixteen types. Consequently, there are lots of sub-strains of the influenza A virus and they are given names depending on the type of proteins found on the surface. Examples of these sub-strains could be H1N1, H1N2 and H2N3.

Another characteristic of the A strain is that it has the ability to produce new strains – in other words, mutate. It is as these new strains occur that new types of flu are discovered.

Bird flu is a strain of influenza A that affects birds, of which all species can be affected. Whereas wild birds can carry the disease when they migrate, they don’t usually become ill with it whereas poultry birds like turkeys and chickens do become ill. The virus spreads easily between these birds.

Bird Flu

It is the H5N1 virus that is causing all the problems with humans at the moment. This strain has affected birds for almost half a century, but it mutated back in 1997 in the Far East and spread to humans. As of yet this strain of the virus cannot be transferred from human to human, only from bird to bird or sometime bird to human.

People with personality disorders may have conditions such as not being able to live with others, not being able to maintain relationships with other people, finding it difficult to control emotions or upsetting other people when distressed.

Causes of personality disorders can include genetic makeup, mental or emotional state or brain problems. There are three types of personality disorder: suspicious, emotional and impulsive, and anxious.

Suspicious personality disorders are where the sufferer is often paranoid of other people, and finds it difficult to interact with others, preferring their own company instead.  The person with a suspicious personality disorder is often seen by others as strange or peculiar.

Emotional and impulsive personality disorders are where the sufferer is indifferent to other people’s feelings and can be quite aggressive.  They often find it difficult to control emotions and will do this spontaneously without thinking about the consequences.  Sufferers will also self harm if they feel really bad about themselves.

Anxious personality disorders are where the sufferer worries about everything.  They are very indecisive and worry constantly about doing the wrong thing.  Anxious sufferers are overly sensitive to criticism and can often feel worthless or incompetent.

There are therapies which can help such as psychotherapy or cognitive behavioral therapy.  There is also medication available to help with the different groups of personality disorders.  Antipsychotic drugs can help those in the suspicious group while antidepressants can help to relieve the symptoms of those in the emotional group.  There are also some antidepressants which have been shown to help those in the anxious group such as serotonin reuptake inhibitors (SSRI).

Personality Disorders

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.