What is hard fomentation? My son’s thigh has become stiff and unable to walk and has got severe pain due to DPT vaccine. He takes baby steps and walks bending his back, he is just 18 months old

A. the DPT vaccine sometimes will become a hard mass which will take few weeks to months to disappeared totallyFurther it is advisable to consult your local doctor for appropriate examination of the baby physically and if there is need to do any investigations if required