What are those red spots that are gradually appearing on the body?

Red spots are gradually appearing on my body.

At first, I didn't pay much attention because I didn't see many, but recently, I'm not sure if it's spreading or if it's a sign of aging.

There are more red dots distributed.

Red spots and small red dots are appearing not only on my arms but also on my forearms and chest. Why is that?

By any chance, do these red dots gradually spread or get bigger?

There are small red dots and dark red dots. Why is that?

It might not be clearly visible in the photo, but in reality, there are tiny dots distributed throughout.

I'm worried that the red spots will keep appearing and getting bigger.

Should I go to a dermatologist for a consultation?