A raised IgE level has many causes, most commonly (in the world) include parasitic infections, then atopy (tendency for allergy), allergic disorders (such as dust allergy
, pollen allergy
etc), allergic asthma
, and the (very rare) hyper-IgE syndrome with IgE >5000.
There is usually no need to repeat IgE level but getting specific IgE tests done (blood test
) or skin prick test to various allergens may help if you think you have a specific allergy.
I hope that was useful.