Raised lump on broken skin from bite to arm?

A raised lump on broken skin from a bite could indicate an inflammatory response to the bite, possibly from an insect or animal. This swelling may be due to localized irritation, infection, or an allergic reaction. It’s important to clean the area thoroughly and monitor for signs of infection, such as increased redness, warmth, or pus. If symptoms worsen or do not improve, seek medical attention.