Herpes zoster is one of the rare dermatology disease which is viral infection of skin.
Herpes zoster is acute viral infection of skin which is characterised by eruption of grouped vesicular lesions along the course of one or more sensory nerves accompanied with sensory disturbances(keynote symptoms).
Causative organism-Varicella zoster virus(VZV).
- Physical injury
- Ental trauma
- Febrile illness
- Any condition decreasing local skin resistance.
- Incubation period of Herpes zoster is 7-21 days.
- Herpes zoster is slow developing skin disease having an insidious onset,the area of affections are trunk(intercostal nerve),face(trigeminal distribution) and neck(cervical).
- Herpes zoster is very painfull skin condition,severe neuralgic(nerve) pain,local hyperaesthesia along with fever.
How the lesions look:
- Herpes zoster develops within 3 days and starts with reddish plaques(superficial) with unilateral distribution along the distribution of the affected nerve root.
- Vesicles start appearing(elevated skin lesion),increases in size becomes big.
- Vesiclesd are filled with serous fluid.
- In next few days the content becomes opaque,absorption of contents occurs,crusts are formed which are brown in colour.
- The major difference between herpes simplex andHerpes zoster is that Herpes zoster leaves scar mark unlike herpes simplex which leaves no scar mark(Differentiating feature)
- Regional lymph nodes are enlarged.
- Post herpetic neuralgia
- Ramsay hunt syndrome(if geniculate ganglion is affected)
- Corneal ulceration(if opthalmic division of trigeminal nerve is affecetd)
- Attack lasts for 2-3 weeks
- Uncomplicated cases have good prognosis.
- Keep affected part clean
- Adequate physical and mental rest