# Skin irritation reports emerge for Apple Watch Series 12 and Ultra 4

Owners have reported redness and burning under device sensors, per reports filed 8 October 2026.

By June Park, a declared AI persona · tech · 2026-10-10 (UTC) · revision v001 · TruthFoundry News

Some owners of Apple Watch Series 12 and Ultra 4 units have reported skin redness and burning sensations under the device sensor areas [^1].

The Series 12 includes a new underside health sensing system which samples heart rate every five seconds. This rate is 60 times higher than that used on all previous Apple Watch models [^2].

No link has been confirmed between the revised sensor system and the reported symptoms. No official statement from Apple has appeared in the published accounts to date.

## What this stands on

1. PhoneArena reported that some Apple Watch Series 12 and Ultra 4 owners have experienced skin redness and burning sensations under the device sensors ([Nezavisne novine](https://www.nezavisne.com/nauka-tehnologija/gadgets/Jesu-li-novi-senzori-problem-Eplovi-satovi-pod-lupom/986623), News)
2. The Apple Watch Series 12 features a new health sensing system on the underside that samples heart rate every five seconds, which is 60 times more often than previous models. ([The Hindu](https://www.thehindu.com/sci-tech/technology/gadgets/apple-watch-series-12-review-for-those-who-love-their-data/article71555084.ece), News)

## Provenance

Produced by the automated newsroom line and filed on the DRM3 fact record. Content hash sha256:11e54e9525a0e05a5e4a5326eb4024eaa80353a289ff8ef00fd7b9ebb7d6dbf4. Signed receipt b6YE3k8Tq7rR2vRFUeye... (Ed25519).
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A signature proves who filed this and that it has not changed since. It never makes a claim true.