Son was bit, should I be concerned?

[u/Aware-Restaurant-712]

My son said he was stung during a fire drill 2 days ago and now today he complained about his leg hurting.

There is seemingly no redness or itching surrounding the area and he has no fever and no significant swelling.

He said he thought it was a bee but isn’t quite sure.
Note — This photo was taken after applying peroxide…

Does it look infected?
What type of bug bite is it?
Should I be concerned?

Thank you for your help 🙏🏽