hard spot where vaccinated?

Anar

hi,

mommies, when I had my baby immunized when he was younger than a year, he had a hard spot under the skin on his thigh. I thought it would go away and forgot about it. he always scratches his thigh and I thought it was eczema or something else skin related. I found out today that there is still a less than a pea sized hard spot under his skin on his thigh where he was immunized. is that normal? he is always scratching that spot when hes sleeping.