Yes call her, but say it was because she was concerned not you and you wanted to check that the erythma has calmed down.
It can take 48 hours sometimes for clients to calm down after a treatment. I did one client once whose skin was like leather, and I went over three times with both crytsal and diamond tips as she wanted a proper peel. Her skin was fine when she left me however she then complained a month later (after booking a course of 6) that she wanted her money back because she looked like a car crash victim!! I later found out that she lost her job and just wanted her money back, which she didnt get because she was in breach of our contract not me!
We eventually established she had had a night out planned that evening and her face started peeling (which it was meant to and she had been advised would for the next week) her lovely friend passed comment that her fella had hit her and she tried it on with me!
Moral of the story I now tell anyone having a treatment that there skin may or may not react! I give them a list of side effects so if they see reddening of the skin or have a break out of spots they know why and dont panic!
I developed this with the company I worked for as several other therapists had similar problems that there clients thought they had been injured.
Its vital you explain to a client how microdermabrasion actually works. Tell them its designed to cause trauma to the skin to enable the skin to heal itself. If they were to have a dermabrasion facial at a cosmetic surgeons they would be bright red, and in some cases bleeding with the treatment as the surgeon goes down a lot deeper than a therapist would. When they realise that microdermabrasion isnt just an skin scrub they understand its effect and the side effects a lot more.
We are educated people and we expect our clients to understand what we know, but even with all the top end mags covering these advanced treatments now its so important that the therapist also educates their clients.
You dont have to be technical, but keeping it simple and explaining cause and effect etc prevents any problems if they think you have done something wrong when you haven't.
Give your lady a call in the morning and be cheerful and just say you were concerned that she didnt feel happy yesterday with the reddening of her chest. Say its perfectly normal but I wanted to double check that its calmed down (if she says no - tell her it can take up to 48 hrs) and say if shes at all concerned to call you straight back, I will probably say she will be fine in the morning.
Kate