How is the redness of the tip of the nose getting bigger?

I don't know if the acne on your nose grows occasionally or often. If it is often long, it is easy to thicken the skin tissue. I guess that's what you mean by getting bigger. Redness may be that the skin has become a little sensitive, and red will appear alternately in hot and cold.

You are still young, and you are still growing. Small changes in development may make you uncomfortable. Developmental period also includes the growth of facial bones, hehe. But it's small.

Hehe, if it is caused by sensitivity, I suggest you use some soothing skin care products, especially in spring.

I hope I can help you, more and more beautiful!