[Concern] My leg has become red and swollen, and it's extremely itchy and spreading upward.

I returned after going out yesterday.

My legs are itchy, so I keep reaching for them.

I was scratching, wondering if I got bitten by a mosquito~
Something seems off, so I checked and it looks like the picture.

Yesterday
The right leg is only affected at the ankle.
The left leg is swollen and red from the ankle down to just below the knee.

 
When I touch it, the surface of the skin feels bumpy. Yesterday, it didn't seem like there was any pus or anything like that.

Today has gotten worse~

The area on my left and right legs that turned red has expanded, and it is very itchy.

I really want to scratch it, but I'm trying to hold back.

The itching has improved a bit after applying the soothing pad.

After removing the patch and some time has passed, it itches really badly again ㅠㅠ

I don't know what to do because it's the first time I've experienced this.

Compared to yesterday's photo, the right ankle also...

It has changed a little.

It feels like a scab has formed.

The photo from yesterday showed redness spreading widely without clear boundaries, but today it looks even redder and the edges seem a bit more defined.

When awake, I try not to scratch.

You can just gently scratch it with your hand.

I am about to sleep

I'm worried that I might scratch myself while sleeping.

It seems like scratching more will make it worse.

What should I do~

Why does this happen?

I don't think it's sun allergy because I haven't exposed my calves either, so I'm not sure of the other reason.

Isn't it the whole body if it's a food allergy?

And especially, I haven't tried anything new or eaten anything I haven't eaten before.

I'm also worried about it continuing to spread.

Initially, my left ankle and leg were all swollen.

My right ankle was only sprained.

The pain has spread throughout my entire right leg below the knee as well.

The left leg is showing several red spots on the knee and thigh area.

My arm and other parts are still okay for now.

I'm worried it might spread further.

Has anyone experienced these symptoms?