My 17-month-old woke up with a rash on h
For reference only. Not medical advice.
Question
My 17-month-old woke up with a rash on his thighs and diaper area but nothing on his hands or mouth yet. Can hand, foot and mouth disease start there, and how do I care for him? Real household: caregiver juggling school week and one elder or sibling nearby. Schedule: Thu; day one of the rash. Kitchen/home right now: fluids, comfort and keeping him home. Already tried: popping blisters or using harsh creams. Please answer as a practical family-care guide: what to do next tonight/today, what to avoid, and a clear decision tree. Constraints: respect «No diagnosis, no medication changes»; no dosing kids/pets/elders yourself; no mystery powders or buying prescription meds online; keep steps screenshot-friendly under ~25 minutes where cooking/care applies. Structure your help as (1) what I already tried vs better alternatives, (2) constraints/avoid list, (3) red flags—when to stop DIY and get clinical/urgent help. Keep the voice concrete and kind for a tired caregiver; stay inside kitchen/home-care/communication levers only. Name what success looks like in 24 hours without promising cures. Avoid brand shopping lists; focus on routines, food already at home, and communication scripts caregivers can screenshot.
Answer
Keep him drinking small sips often, change his nappy with water only and no scrubbing, and before anything else tonight press a clear glass firmly on the spots to see whether they fade — that one check tells a clinician more than anything else you can do at home.
On your first question — yes, it can. Hand, foot and mouth disease usually shows up as sores inside or around the mouth first, then small blisters on the hands, feet and bottom. A rash that begins on the thighs and nappy area on day one can be the early picture of it, but it fits other things too, including ordinary nappy irritation and other childhood viral rashes. I cannot tell you which one this is, and I don't diagnose — but I can tell you what to do tonight while you arrange for a clinician to look.
1) What you already tried, and the gentler alternative
| What you did | Better from tonight |
|---|---|
| Popped blisters | Stop. Leave them intact. If one opens on its own, pat dry with clean water or gauze, leave it open to air, no powder and no wipe on it. |
| Harsh creams | Stop the harsh ones. If he already has a nappy barrier cream you have used before, keep using that same thin layer. Nothing new, no steroid, no antibiotic, nothing bought online without a prescription. |
| — | A 15-minute routine instead: glass test → one photo with the time → water-only nappy change, pat dry → small sips and cool soft food. Then stop hovering and let him rest. |
Cool, soft, boring food from your own kitchen: porridge, rice, yoghurt, banana, soft bread. Small sips often, and keep the cup in his hands so he is not being chased to drink. A cool clean flannel on the mouth for a minute or two is fine. Wash your hands after every nappy change, and keep his cup, spoon and plate to himself.
Take one photo today with the time on it, and another tomorrow morning if it has spread — that pair of photos is worth more at the clinic than any description.
2) Avoid list
- No aspirin, ever, for a viral illness in a child.
- No leftover antibiotics, no adult tablets, no someone else's prescription.
- No alcohol wipes or alcohol sponges on the skin, no powders, no mystery teas or remedies bought online without a prescription.
- No new creams, oils or steroid preparations on the sores.
- Do not force food or drink if he will not take it, and do not scrub, peel or squeeze anything.
- He stays home and low-contact today, as you planned, and does not share cups or spoons with the sibling.
3) Decision tree — when to stop home care
Call your local emergency number now if he: cannot drink at all, or goes hours without a wet nappy · is floppy, drowsy, or will not wake · is breathing fast or hard, grunting, sucking in below the ribs, or his lips look blue · has a fit · has spots that do not fade under a pressed clear glass, especially with a fever · has skin peeling off in sheets or the nappy area looking scalded and raw · has a spreading hot tender patch, or pain out of keeping with the redness · is simply getting worse.
See a clinician the same day if: the fever is heading towards four or five days, or you see red eyes, cracked lips, a very red tongue, or puffy red hands and feet · he refuses a whole feed · the sores bleed · his mouth is so sore that fluids will not go in.
Otherwise, home care tonight and phone the clinic in the morning — bring the photos, the times, and these facts: when it started and where first, whether it fades under a glass, his temperature, what he is drinking and how many wet nappies, any new medicine or food in the last two weeks, and any chickenpox or measles contact.
Success in 24 hours is not a cure. It looks like: he is taking small amounts of fluid often, his nappies are wet, he is alert and playing between rests, his mouth is soothed rather than bleeding, any opened blister is clean and not spreading, and you have managed some sleep.
One thing that would help: which country and city are you in? I would rather point you at a real clinic door for him than guess at one.