Why does the skin turn red and itchy when wearing the Xiaomi Smart Band 10?

The Xiaomi Smart Band 10 has passed the biocompatibility test and the hazardous substance test, and meets the relevant standard. If you have suspected allergic problems, it is recommended that you wear the band slightly looser, and pay attention to keeping the band clean, dry, and breathable to avoid suspected allergies caused by friction, sweat, bacteria, etc.
For your reference, here are more details about skin turning red and itchy when wearing the band:
1. If your skin becomes red or uncomfortable, it is recommended that you remove the device. If the symptoms don’t improve for more than 2-3 days after removing the device, please contact a dermatologist in time;
2. Sweat, dust, or soap residues can accumulate under the band, leading to irritation or rashes.