Swelling of the leg after 13-valent pneumonia vaccination may be due to an adverse reaction to the vaccination, an infection that occurred after the vaccination, or it may be due to kidney disease, heart disease, and other reasons.
Infants usually choose the anterolateral thigh muscle for 13-valent pneumonia vaccination, and young children usually choose the deltoid muscle of the upper arm for 13-valent pneumonia vaccination.
If localized swelling occurs in the legs of infants after vaccination, it may be due to incomplete absorption of the medicine, infection at the vaccination site, etc. Kidney and heart diseases are less likely to cause it.
If leg swelling occurs after vaccination in young children, because they are vaccinated in the upper arm, the lower limbs are less likely to be swollen, so you can consider whether the young children are suffering from kidney and heart diseases.
Usually, leg swelling due to normal adverse reactions to vaccination can subside within a few days, but if it is delayed or gradually worsens, it is recommended that the child should go to the hospital.