My skin has suddenly become sensitive. What could be the cause?

My skin wasn't originally very sensitive, but recently it has been stinging and turning red.
I have been using the same basic products, so I am confused that they have suddenly changed like this.
In particular, dryness and tightness worsened after washing my face.
I'm not sure if it's because of the change of seasons or if my skin barrier has broken down.
For those of you who have had a similar experience, how did you manage it?