I have a red irritated circle from my Apple Watch

Hi

If you are highly allergic to nickel, for example, then is possible that your band and/or your Apple Watch may cause a skin reaction.

If you experience redness, swelling, itchiness or any other irritation or discomfort on your skin around or beneath your Apple Watch or band, then Apple recommends that you remove your Apple Watch and consult a doctor / physician before wearing it again.

More information - including about the material content of bands and cases - and related tips from Apple:

• Cleaning your Apple Watch - Apple Support

  Includes "Tips to avoid skin irritation, or if you have allergies or skin sensitivities".

• Wearing your Apple Watch - Apple Support
• See sections including "Skin Sensitivities" and "Prolonged heat exposure":

  Important safety information

Note that, band materials aside, there is no model of Apple Watch that has no metal or nickel touching the skin; the magnets in all models of Apple Watch contain some nickel.

Also be sure to follow the instructions here:

Keep Apple Watch within acceptable operating temperatures - Apple Support

If you are concerned that your band or Apple Watch may have a manufacturing defect, then I suggest that you contact Apple Support (remote diagnostics and/or mail-in service may be available, if required), make a Genius Bar reservation or visit an Apple Authorised Service Provider for assistance:

• US: Apple Watch Service Answer Center - Apple Support
• Elsewhere: Apple - Support

(Note that you are not talking to Apple here - this is a user-based technical support community).

Stop wearing it and see your doctor. You probably have a nickel allergy.