Plan B · Learnthe unglamorous fix
Constipation is stealing your child’s appetite
If your child eats almost nothing during the day and then binges at night, look at their bowels before you look at anything else.
The pattern this produces
A backed-up gut means early fullness and no daytime appetite. So the child skips breakfast, refuses lunch, and picks at everything — until evening, when things finally move and they are suddenly ravenous.
Parents describe this as "he eats nothing all day and then binges." That is not a behavior problem. That is a plumbing problem.
Why it matters more in a PANS child
- It blocks detox. Whatever you are trying to clear gets reabsorbed instead of leaving. That is why binders and antimicrobials go wrong in a constipated child.
- It worsens behavior. Discomfort and poor sleep amplify everything.
- It is linked to bladder problems. Constipation is a leading driver of urinary frequency, accidents and recurrent UTIs — especially in girls.
- It is often invisible. A child can pass something daily and still be significantly backed up.
What to actually do
- Aim for a soft daily bowel movement, reliably, before you judge appetite or start anything new.
- Magnesium citrate — does double duty as both the mineral most of these children need and a gentle motility aid.
- Real hydration. Most of these children are genuinely under-drinking, and it shows up on labs as a raised BUN/creatinine ratio.
- Fruit, fiber, and movement.
- Ask the doctor if a clean-out is warranted if it has been going on a long time — sometimes maintenance alone is not enough to catch up.
For children who refuse to drink
A tasteless option works better than arguing: trace-mineral drops plus a pinch of real salt in their water adds electrolytes without a flavor to object to. Fluid-heavy foods — soups, smoothies, fruit — count too. In a dry climate, a bedroom humidifier helps more than people expect.
Want this answered for your own child? A Plan B synthesis reads every lab and note you have — together — and tells you what is driving the picture, what has never been checked, and what to ask for next.
The first one is free, and you keep the list either way. Phone photos of labs are fine.
Plan B for PANS is written by a parent, not a physician. Nothing here is medical advice or a substitute for your child's clinicians — it is meant to make you the best-informed person in the room when you talk to them.