The names cold sore and fever blisters are interchangeably used for the same disease.
It is caused by a virus called Herpes Simplex Viruses by infections.
When infected, these viruses will attack the nervous system and skin.
  It may inhibit dormant inside the body for a long time and when they get triggered, activate them causing infections in the human physiques.
  They can attack the body's nervous system when they are dormant.
A stimulating trigger may activate them and its presence will be obvious by some sort of blisters around the mouth.
These blisters can cause a painful experience and appear watery and can have even in genital areas and mucous membrane.
Once your body undergone attack of these viruses, they will endure in the body through out the lifetime and it is almost impossible to flush them out.
Treatment only retreat the viruses back in the cells of nerves.
There they will remain dormant and eventually activated later and results another infection.
Since the HSV endure permanently in the body we cannot get rid off them completely.
Instead we can reduce the chances of future outbreak of infection.
For that a proper control over the triggers are necessary.
When one is suffering from cold or flue, body will easily triggers the viruses.
This necessitate one should have to take immediate care for such instances to prevent the occurrence of cold sores.
Stress is another trigger for cold sore.
Stress will result in a weak immune system in the body and allows the activation of the viruses causing blisters ultimately.
One should keep away the stress to keep off the cold sore.
Over exposure to sunlight may also cause a trigger to the possible infection of fever blisters.
  Some people may be very sensitive to sunlight and suffer with sun burn when exposed to sunlight.
  This people will be quickly affected with cold sore.
  Sunscreen lotion is the simple remedy to keep away this menace.
Apply lotion in the most prone areas like lips to defend against the cause of blisters.
Some times excess cold or wind can also cause some blisters.
During menstruation period and pregnancy period, generally the body will undergo some hormonal changes.
This may trigger certain kinds of cold sore that are hormonally induced.
Proper rest is always advised to a patient to reduce the chance of cold sore infection.
  Sufficient sleep will keep ones body fit and all immune systems responsive.
Diet should also be taken care with proper combination of foods which supplies proper nourishment.
  Balanced consumption of nutrients and proteins is vital in the healing process of cold sore.
Antioxidants are important in protecting the body from affecting cold sore.
Deficiency in Vitamin B may cause frequent outbreaks of blisters.
Such people have to include external supplement of antioxidants and vitamins in their diet.
  Lysine type amino acids will also shields the physique from the attack of cold sore.
  Over all one should have a proper guidance from a physician to have this healed immediately.