All of a sudden allergic to peanuts?

Hi, so im 21 and all my life I havent had any allergies to peanuts.

How ever I was diagnosed with U.C last year. Have taken prednisone for 6 months now coming off them at 10mg and on 100mg of mercaptopurine.

The other day I bought some peanuts and had around 50 grams and no problems. But this morning I had some, and after washing my face I felt under my lip was all tingly, numb and is now feels a little swollen.

I only had a banana today and 25gams of peanuts.

Is it possible that you can develop an allergic to peanuts later in life? Or maybe the prednisone or mercaptopurine has caused this? Some thing to do with immume system?

Thanks.

For sure you can develop an allergy to any food anytime in your life.

One theory about this disease is that your intestines become permeable and allow nutrients (like proteins) to get into your bloodstream. All of a sudden you have problems with all kinds of foods you never had problems with before.

If you go on a diet like SCD or GAPS, the (loose)idea is that you allow your 'leaky gut' to heal and then you add back foods as you can tolerate them (while starving the bad bacteria that live in your digestive system).

Legumes (peanuts are legumes) are often problematic foods for people with auto immune issues and may be a good idea to avoid.

I don't really want to comment on your particular case but to answer your question, many people do grow allergic to things that they had not been allergic to in the past, whether you have UC or not.