SF writer Peter Watts needs help diagnosing mysterious, debilitating illness

Elimination diet? You eliminate everything that could possibly cause an allergy, which pretty much leaves you eating rice, maybe plain chicken, and water for a while. Then you add in every possible problem food, one at a time with some kind of waiting period each time, until you have a reaction to something. I’ve known several new mothers who were advised to go through this process while breastfeeding to figure out why their newborn babies seemed to be allergic to their breastmilk. Sounded pretty awful.