Should I be concerned about this bug bite ?

Age : 27 Sex: M Height: 5’11 Weight: 210 Race: white Duration of complaint: 1 day Location: Florida Any existing relevant medical condition: t1d https://imgur.com/a/g7xFaLN Hi ! I found a bug bite or whatever this is on my arm . Over the day I’ve noticed it got a little bigger and has a red tail now . I’ve read that the red line might be cause for concern . Any help is appreciated thank you !