Baby’s ears are red, swollen, hot and itchy mainly due to the following reasons: 1. mosquito bites, baby’s skin is relatively weak, when the ears are bitten by mosquitoes, it is easy to appear local redness, swelling, itching, pain and fever; 2. ear chondritis, because the local skin mucosa is broken, not timely treatment, bacterial infection causes ear cartilage inflammation resulting in red, swollen, hot and itchy ears; 3. Babies are allergic to flowers, trees or other things and are inadvertently touched causing allergies; 4. The skin on the baby’s ear is thin and capillary dilation in the ear occurs during sports or activities, or if it is accidentally hit, there will be local redness and heat, swelling and slight itching in the ear. If this happens to your baby’s ears for a long time, it is recommended to go to the hospital for examination and treatment.