My son had it when he was about a year old. His pedi said it was one of the worst cases she'd ever seen, and asked if she could run and get some med students to show them. Lovely.She also said she'd had it herself as an adult. Benjamin's rash lasted nearly a month, and covered his entire body from head to toe, and then blistered all over which took a couple more weeks to heal. It was awful. He still has some scars on his butt a year and a half later. That said, neither my husband nor myself ever got it. It's spread via poop getting ingested (eww...I know), so as long as everyone washes their hands well after going potty or changing diapers the baby should be ok. Its very common. Our pedi said tylenol/ibprofen alternating for pain as the rash is painful rather than itchy, and lots of cold soft foods (popsicles, jello, yoghurt, etc) because they often have sores in their mouths. We also ended up with a topical antibiotic because some of the sores around his mouth were getting infected after they'd blistered. You can only have one strain of HFM once, but you can still get another strain. DS actually got it a second time, about a month after the first time finally healed, though it was much, much milder. Hang in there mama!