Our baby just turned 6 months old and is

Answer

Short answer: **No — don't rub peanut butter on his skin or lips. It can actually raise his allergy risk, and it's not a reliable safety test.** Here's what's safer tonight and what to plan for.

## Why the skin patch test is wrong on two counts

- **Skin exposure without oral exposure can sensitize** — especially through eczema-damaged skin. The skin-first theory came from older advice that early-introduction research has now overturned. The LEAP-style guidance is *oral* early exposure, not skin contact.
- **A negative rub doesn't predict a safe feed** — and a positive rub doesn't tell you whether the next mouth-feed would be mild or severe. It just makes the next step harder to read.

So put the jar back on the shelf and use the mouth route — prepared, not improvised.

## Your son's risk tier

Mild-to-moderate eczema puts him in the **moderate-risk** group for peanut allergy. Current guidance (AAAAI/ACAAI/FAE/LEAP) splits as follows:

| isk tier | Definition | Where to introduce |
| --- | --- | --- |
| High | Severe eczema **or** egg allergy | Allergist visit first; often a supervised feed |
| Moderate | Mild-to-moderate eczema | **Either** home **or** allergist office — parent + clinician choice |
| Low | No eczema, no food allergy | Home is fine |

He's in the moderate row. So both are legitimate options. Given your husband's anxiety and how rushed the pediatrician was, **a single visit to a pediatric allergist is a reasonable ask** — they can do a skin-prick test or specific IgE, decide whether the first feed should be in their office, and give you a written plan. If you'd rather not wait for an appointment, home introduction is also within current guidance, with preparation.

## Safe form and first feed (what the cards say, not a recipe)

- **Never** whole peanuts. **Never** a thick spoonful of peanut butter straight — both are choking hazards at this age.
- **Age-appropriate forms**: smooth, thinned peanut butter (stirred into a small amount of warm breast milk, formula, or his usual oat cereal until it's a loose, pourable consistency), or peanut powder mixed into his purées. Stir well — no lumps, no clumps.
- **One new food at a time**: don't introduce peanut on the same day as another first-time allergen. Keep the package (brand, ingredients, lot) for the visit.

## The 2-hour watch window

The first oral dose is the step that matters. Plan it like this:

- **When**: a normal weekday morning or early afternoon, when he's healthy (no cold, no vomiting, no diarrhea, no eczema flare that's worse than usual). Not a weekend evening, not a travel day, not right before a nap somewhere you can't be reached.
- **First taste**: a very small amount on the tip of a clean spoon or your finger, or a thin smear on the inside of his cheek — *oral*, not skin. Wait **about 10 minutes**.
- **Then**: if no reaction, give a slightly larger taste (still mixed thin, not a glob). Watch for **about 2 hours total** before you consider the first feed "done."
- **epeat**: aim to keep peanut in his diet roughly **a few times per week** afterward. Single-taste-once doesn't build tolerance — regular exposure does.

## What counts as a reaction — stop the feed and act

Any of these during the 2-hour window:

- Hives, spreading rash, flushing
- Lip, tongue, or face swelling
- Vomiting (more than spit-up)
- Cough, wheeze, hoarse cry, noisy breathing, color change, going floppy

**If you see any of those, especially breathing or color changes: lay him flat, call your local emergency number now, and if you have a prescribed epinephrine auto-injector use it per that device's leaflet.** Antihistamine doesn't replace it.

This is one reason an allergist visit is worth considering — they can write you a concrete emergency plan before you start.

## Before you begin, two things to set up

1. **Confirm who's on call**: know exactly which emergency number you'd dial from your home, and that both you and your husband can recite it. Tell me what country or region you're in and I'll pull the right one for your area — I don't want to print a number from memory.
2. **Write down the package**: brand, ingredients line, lot/best-before date, the time of first feed. Bring it to any follow-up visit.

A reasonable plan for a moderate-risk baby with anxious parents: book a pediatric allergist for a first assessment (skin-prick or blood specific-IgE), then do the supervised-or-home first feed on their advice. If the appointment is weeks away and he's still in the moderate-risk row, home introduction with the 2-hour watch above is within current guidance — not a substitute for that visit, just a bridge.