Bald Spot

https://imgur.com/a/DLq4MDh

My lil guy has been wearing a high-neck medical shirt for about 14 days, post-surgery. Is it normal for the shirt's collar to wear in a bald spot?

He's about 7 years old and the surgery was on his side. Fatty tumor removal. Healed up well.

Bald spot doesn't seem to be bothering him. Just wondering if this is common?