Apple Watch Series 12, Ultra 4 Owners Report Skin Irritation

Certain Apple Watch Series 12 and Ultra 4 users have reported skin irritation issues with the latest models, based on discussions on MacRumors forums and Reddit. Owners experience a burning sensation and redness around the sensor area, leading some to question if the frequent heart rate measurements could be the cause. The Series 12 and Ultra 4 have enhancements such as increased heart rate readings, a larger ECG electrode surface, ring-shaped photodiodes, and larger green LEDs.

However, it remains uncertain if these design changes are responsible for the irritation. Apple suggests possible causes include wearing the band too tightly or loosely, as well as irritants like soap and sweat under the watch. Some Apple Watch models contain nickel, though the amount is low and below EU limits, minimizing potential issues.

The watch's case and bands contain trace amounts of acrylates and methacrylates from adhesives, but Apple ensures these components are kept away from the skin. Apple advises users to ensure a proper fit for the band and maintain cleanliness of the watch, bands, and skin, particularly after workouts or exposure to sweat, soap, sunscreen, and lotion.

Some users' issues have resolved after an adjustment period, and cleaning the back of the watch and the band has helped in certain cases. Others have returned their devices. Apple recommends consulting a physician if users experience redness, swelling, itchiness, or other irritation before wearing the watch again.