Kudos to all of you have figured out food allergies are the source of your GA. To the rest of us for whom the cause remains more illusive, a few thoughts for consideration based on my own experiences as a sufferer, diagnosed about 2 1/2 years ago (and I'm 56 years old now). I have been gluten-free since my diagnosis, and changing my diet has not improved my condition.
Still a few thoughts based on my own journey:
1. Western medicine had no answers to improve my condition; only a biopsy to validate I did indeed have granuloma annulare. The extraordinarily expensive steroidal prescriptions were useless.
2. Eastern medicine and a naturopathic doctor have been a far better course for me. The treatment focuses on acupuncture and Chinese herbs (don't ask about the specifics since my TCM -- Traditional Chinese Medicine -- doctor often adjusts the herbs and they don't translate to English anyway).
3. Sun exposure: A double-edged sword because no one wants to trade a lessening of our unseemly but benign GA lesions for melanoma. Still, some treatments recommend PUVA and other diagnoses suggest an inability to internally process Vitamin D. I live in the sunbelt of the U.S. and an hour's exposure of sun on my legs each week seems to help immensely.
4. Lotions and potions- Although my naturopathic doctor have told me to avoid detergents, soaps, and lotions containing parabens, I've found for me that Eucerin "skin calming daily moisture creame with natural oatmeal and moisturizers" is fabulous (yes, it does contain parabens -- in layperson's terms are preservatives).
A few thoughts for all of us sufferers and the medical community for further research:
1. My first GA outbreak occured about 5 weeks after I'd suffered the cold from hell, traveling from sinusitis to bronchitis over a period of about 8 weeks and being on at least two different antibiotic prescriptions. Just recently do to a non-GA related skin infection in a finger, I was prescribed Keflex, another antibiotic, a cephalosporin drug. 36 hours later, I woke up with a huge swollen red spot under my eye... certainly not GA, but the doctor later confirmed my allergy to this type of antibiotic... so wondered if there's a relationship between all those other antibiotics I took that early fall before my first GA outbreak occurred.
2. My mother's sister (who's 25+ years older than I am) has sarcoidosis which is related to GA. Just wondering if there's a genetic tendency to these related conditions.