This question can be more scientifically expressed: “How long does a herpes outbreak last?” Because, even though you have the herpes virus for life, it causes annoyance only during an outbreak.
When the virus reactivates (or wakes up) it travels nerve paths to the surface of the skin, sometimes causing an “outbreak” or break out of symptoms. During an outbreak you will experience:
– Inflammation (Swelling, tenderness, burning and redness may appear before the actual outbreak and may include itching and sensitivity. There are some lucky people for whom the inflammation does not progress past this stage)
– Blisters or Bumps (one or several small fluid filled lesions, tiny red bumps or a rash that may resemble small fissures (little paper-like cuts))
– Ulcers (the blister breaks forming a small, round, wet looking ulcer which may leak a clear to milky colored fluid)
– Crust (The sores will normally begin to dry and crust over forming a scab, which will usually fall off naturally and of its own accord once the skin has been repaired underneath)
The symptoms of a genital herpes infection will typically last from 3 to 14 days, but in some rare cases it may take up to six weeks or so to resolve. The first outbreak is generally the worst for most people and is sometimes followed by a second bout of symptoms shortly after, as the body develops its immune resistance. As time goes on there are usually fewer sores, they heal faster, and the outbreak is less painful. Some people never experience another recurrence. The first year after infection usually has the most viral activity
Conclusion: NO, genital herpes could not itch for months, even if you have a terrible first outbreak followed immediately by a second equally terrible outbreak, you could not itch for more than 1-2 months (and this is a rare case for the unlucky ones).
So go to the doctor to be sure that you have genital herpes and not other disease, use topical medication to ease the symptoms and remember and after the first 2bad outbreaks your life will become easier. Read here about the treatments for herpes.