For the past month I have experienced these strange shaped welts that have appeared on my legs , arms mainly. But actually all over...and it's always about 20 to 30 minutes after eat..This has never been an issue and it is very disturbing. On March 1 ..participating in Lent, I gave up carbohydrates during this time and have lost a significant amount of weight. .wondering if it had any bearing on this outbreak. ..can anyone help.