Who is recommended for winter skin boosters, and how do you distinguish between inner dryness and skin barrier condition?

I am looking into a consultation for skin boosters due to internal dryness and loss of elasticity. Since I have never received a treatment before, I am curious about who is recommended for winter skin boosters and what specific skin conditions are used for this assessment. Rather than deciding on a treatment simply because of dryness, I would like to understand the distinction between conditions where moisturization is needed first and conditions where a treatment can be considered after a consultation.

In particular, how does the examination determine whether my skin is temporarily sensitive due to a weakened skin barrier or if the dryness is caused by other factors? Would it be helpful for the assessment if I listed the cleanser, moisturizer, and exfoliating products I have recently used? If I need to discontinue specific products before the consultation, I would also like to ask what ingredients should be checked.

I would also like to know if, even after being told during the consultation that I can consider the procedure, the treatment is postponed on days when I experience redness or stinging, or if moisturizing care is tried first followed by a period of time to check the condition again. Rather than assuming the effectiveness in advance, I would like to make a decision after receiving a full explanation of the criteria for choosing and postponing the treatment based on my current skin condition.