Yes.. sorry for miss spelling it. It is Natrum Muriaticum(200c) from Boiron. I think I ordered it from Elixirs.com. I highly recommend you go to a local Classical homeopath for a full constitutional. There are hundreds of remedies that can be very specific to a person's deep down disturbances, which is triggering the problem to finally surface on the skin. My mom's homeopath said she has had a great responce with this remedy inparticular with people that suffer bad allergies. (which is what you have developed)
The dosing is key.. only take four doses (3-4 pellets under the tongue to dissolve) a half hour after/before eating(must have a clean pallet). The recommended dosing on the tube is not the way a homeopath would prescribe the remedy. I would take a dose morning/night and then morning/night, then wait a couople weeks and see how you are doing. Homeopathy treats "like with like" in order to trigger your body to heal itself. It's kind of the same concept as a vaccine. You don't want to take too many doses. I normally start feeling a "shift toward a healing" about a week to ten days after I've taken a dose, and if it's the right remedy for your then it is really worth being patient with it. I have tried everything to heal my skin and sinus trouble and this is the only thing that feels like a real healing rather than a bandaid.
Good Luck!
BTW.. My daughter is named Mackenzie!! I hardly ever see it spelled exactly the way we spell hers!!