Short term abdominal pain, nausea is usually attributed to 'bad food', a bug. These are usually short term and benign.
If you live in the mid part of the USA in an area extending to the East coast that is habitat for the Lone Star tick it could be more serious. Even most physicians are unaware of this and since most cases are self limited is is usually misdiagnosed.
The reason it must be considered in cases of repeated abdominal pain, nausea and hives is that Alpha-Gal is a likely cause. Diagnosis is important because the allergy can become a serious anaphylactic reaction that can cause death. We are lucky that death is a rare complication because I'm sure there are many cases. If you have something like gastroenteritis and hives consider Alpha-Gal. You may have to make the diagnosis yourself.
Seventy four old retired physician, Veteran of the US Navy in the Vietnam era, markedly opposed to the futility, waste and brutality of our wars for the riches of the elite. I want America back as futile as that aspiration is.