Pictures would help the experts here and they wont hesitate to help you
Good luck!

This post was edited by MohammadLawati on Mon, Jun 30, 14 at 3:15

Photos, please. And, what are you using for fertilizer and how frequently are you fertilizing. Impossible to tell you exactly, unless we have photos and know your fertilizing habits and product. Never use a urea nitrogen product with a potted citrus, as you can get biruret burn. You are much better off using a liquid fertilizer that is formulated for citrus, and contains all the micronutrients. Most container citrus folks on this list prefer to use Dyna Gro's Foliage Pro, along with a time release product, such as Osmocote Plus. And yes, you need to check for scale on a regular basis. It is very difficult to get rid of. A high pressure jet of water will not get rid of scale, as it is adhered to the stems and leaves.

Patty S.

@hoosierquilt wow, I seem to have been doing things the wrong way got to edit that post before something happens

Nutrient deficiencies

yellow vein chlorosis, needs fertilizer w/ micro nutrients

http://edis.ifas.ufl.edu/ch142

Here is a link that might be useful: citrus deficiencies