If your 10-month-old baby has had a bump or sting for about a week, it is important to monitor the area for any changes. If the bump is very red, swollen, resembles a target, feels warm to the touch, or if your baby is scratching it a lot, it may be a good idea to seek medical advice. In the meantime, you can clean the area regularly with gentle soap and water, and apply cold compresses for 10-15 minutes several times a day. Hopefully, these steps will help improve the situation.