Hi
If you experience redness, swelling, itchiness or any other irritation or discomfort on your skin around or beneath your Apple Watch (or band), Apple recommends that you remove your Apple Watch and consult a doctor / physician before wearing it again. Skin reactions can be a result of various causes including:
- Allergies (eg to nickel).
- Extended exposure to irritants (eg soap or sweat).
- Environmental factors.
- Wearing the band too tightly or too loosely (eg causing rubbing).
More information: