Is it okay to leave the tremor alone?

My daughter has been developing red swelling whenever she scratches her arm recently.

I've never experienced anything like this before, so I'm a bit worried about it suddenly happening;;

Looking into it, I think it might be a seizure disorder. Does this also occur during a panic attack?

Maybe I ate something wrong... I can't tell if my constitution suddenly changed.

It seems there is no special cure or medication available.

I'm not feeling any pain or anything, but it looks swollen and red, so it doesn't look good and it bothers me.

Is it still better to go to the hospital and get a check-up?

Or should I just hold and carry it? ㅠ

When it swells up, I feel a slight warmth, so I just cool it down with cold water and apply something like aloe gel.

I'm not sure if it's okay to just do that ㅠ