Question
After a baby is vaccinated, a hard lump appears on their arm and does not disappear. How should this situation be handled?
Answer
It is common for a hard lump to appear on a baby’s arm after vaccination. As long as the lump is not accompanied by redness, swelling, pain, or inflammation, there is usually no need to worry excessively. This lump is similar to what is commonly referred to as a “smallpox bump” and is a normal reaction to vaccination. Parents should pay attention to the baby’s care, ensure they get plenty of rest, and maintain a diet of light and easy-to-digest foods. They can also apply heat compresses appropriately to help reduce swelling. Meanwhile, maintain a light diet and continue to observe the changes in the lump.