This Celiac.com FAQ on celiac disease will guide you to all of the basic information you will need to know about the disease, its diagnosis, testing methods, a gluten-free diet, etc. Subscribe to FREE Celiac.com email alerts What are the major symptoms of celiac disease? Celiac Disease SymptomsWhat testing is available for celiac disease? - list blood tests, endo with biopsy, genetic test and enterolab (not diagnostic) Celiac Disease ScreeningInterpretation of Celiac Disease Blood Test ResultsCan I be tested even though I am eating gluten free? How long must gluten be taken for the serological tests to be meaningful?The Gluten-Free Diet 101 - A Beginner's Guide to Going Gluten-FreeIs celiac inherited? Should my children be tested? Ten Facts About Celiac Disease Genetic TestingIs there a link between celiac and other autoimmune diseases? Celiac Disease Research: Associated Diseases and DisordersIs there a list of gluten foods to avoid? Unsafe Gluten-Free Food List (Unsafe Ingredients)Is there a list of gluten free foods? Safe Gluten-Free Food List (Safe Ingredients)Gluten-Free Alcoholic BeveragesDistilled Spirits (Grain Alcohols) and Vinegar: Are they Gluten-Free?Where does gluten hide? Additional Things to Beware of to Maintain a 100% Gluten-Free DietFree recipes: Gluten-Free RecipesWhere can I buy gluten-free stuff? Support this site by shopping at The Celiac.com Store.For Additional Information: Subscribe to: Journal of Gluten Sensitivity
This is very interesting since I have experience similiar. When you fly, your body gets very dehydrated. I always purchase the largest water bottle offered at the gift shop right before getting on the plane and try to drink it ALL before I land. This way, I stay hydrated and I can be sure to flush myself out once I arrive (which can help with bloating). I also only bring certain snacks (a cut up fruit with some nuts, some turkey) to munch on if I feel like I need a little something.
I just started Gluten-Free for about a month (with some minor hiccups) and for a period of time my arms cleared up completely. Granted I was on vaca and I dont know if the sun/warm weather had something to do with it. However, these next couple weeks will tell.
On a stickier note (concerning the Peanut Butter) I have removed PB from my diet since starting gluten free. I did this because I was experiencing discomfort after eating it. The peanut is a legume which has "similar traits to grains in their make-up; they contain phytates which inhibit nutrient absorption and cause inflammation" - source: http://www.livingpaleo.com/foods-to-avoid-on-the-paleo-diet/
Maybe you should try avoiding peanuts/PB for a couple of weeks to see if there is any difference