"At first I thought I had been stung by something due to the burning pain in my belly button.Hyatt is keeping his twin in a small plastic jar.
"But there was no sign of anything on the skin. Then I felt a large lump just above my navel, which was so painful that I nearly passed out.
"I couldn’t sleep and made an emergency appointment with the GP the next day.
"There was a red patch around the area which was hot to the touch. Dr Santos felt it and said it was a hernia."
Mark Frauenfelder is the founder of Boing Boing and the editor-in-chief of MAKE and Cool Tools. Twitter: @frauenfelder. His new book is Maker Dad: Lunch Box Guitars, Antigravity Jars, and 22 Other Incredibly Cool Father-Daughter DIY Projects