[Question] Why does the skin disease that has spread to the hairline keep recurring?

 

Last week, a fairly large skin lesion appeared on the lower part of my right ear.

It was quite red, itchy, and stinging.

It has subsided after applying ointment for a few days.

It is now slightly stained, and the surface feels rough and itchy.

However,

I saw today that it's spreading sideways ㅠㅠ

 

The darkened area on the right side was the initial dermatitis.

 

I didn't notice because it's at the back of my neck and not visible to the eyes, but when I saw it itching, I realized it had spread along the hairline.

I don't know why this keeps happening.

 

There were no such skin diseases like this in the past.

Don't you get dermatitis on both legs during midsummer that you've never seen before?

Now my neck is a mess~

 

Photo of a skin disease that first appeared last week

 

[Now a tingling, prickly sensation with staining marks]

 

The bump on the back of my neck was round and large, but it has subsided. It doesn't sting anymore, but it's still itchy and the surface of the skin isn't smooth.

 

Looking at how it suddenly spreads sideways, is it contagious? (Is it spreading or just appearing in that spot?)

Lately, I keep getting skin diseases. Why is that?

Could it be related to immunity?

 

I heard that if you frequently put your hands on your face because your hands have a lot of bacteria, it can cause trouble.

I can easily touch my neck, but I don't understand why I keep getting skin troubles.