How do you distinguish between red marks and current inflammation during an acne consultation?

I would like to know the criteria used to distinguish between current redness and red marks left behind from previous breakouts during an acne consultation. I have heard that even if they look similar on the surface, the order of treatment can vary depending on the presence of current inflammation; how are pain, heat sensation, and the condition of the skin surface assessed during the consultation? I would also like to know which step—extraction, soothing, or moisturizing—is prioritized when there is excessive sebum and dead skin cells, or when the skin is dry. I am curious about the recommended period to avoid exfoliants and functional cosmetics before and after acne treatment, as well as when I can resume my usual cleansing and makeup routines. I would appreciate guidance on how to differentiate between temporary redness or dryness from reactions that require a medical consultation. Please also explain the general criteria for determining when to re-evaluate skin condition after a treatment, the interval for future treatments, and home care methods.