What Causes Red Itchy Pimples On The Face?

HI, My name is Shikha and I am 26 years old. I have never got any kind of acne or pimples on my face in earlier life and my skin is normal but little dry sometimes with a very sensitive nature. Therefore, I don t use any harsh cream or go through any facials regularly. All I do for my skin is cleansing. We had a function on 07.06.2014 and I went for a facial on 05.06.2014 for the first time. I had a little itchy skin that time and two or three pustules on my face before that facial. But I vanished them by putting Soframycin overnight. But as of now, I have been allergic on my face. I got lot many pimples and they are too scratchy and red in color. I have been to a dermatologist. He gave me allergic tabs plus a lotion and one other cream to put on those pimples. Today is the first day I will start using them for next ten days. I need to know that what could be the reason for this allergy so that I would remain cautious for next time. The reasons which I believe that could be: 1. From 25th may, I started applying daily a mixture of milk (boiled) with turmeric on my face, neck and arms as well before I take bath which was supposed to be applied for a natural glow. 2. I was using an old cleansing milk too from last 15 days, which I saw today, that the same has already been expired in 2013. 3. That facial could be a reason as I have gone through the same for the first time. But I have had a few pustules before the same. 4. Another thing is, on the very next day I have gone through the facial, i.e. on 06.06.2014, We had some breakage work at home, and the time the labor completed their work and the cleaning of cement and dust was started, I started getting my skin more itchy and even flammable. Then I washed my face with cold water and mild soap & was feeling better after doing so. It was all fine with my skin during 07.06.2014. I done mild makeup too on my skin but got no rashes, itching or any kind of inflammation but all of a sudden on 09.06.2014 I got allergic reaction and went for a doctor today. I was using that cleansing milk during these two days for makeup removal too. Kindly let me know the exact reason or the most probable one so that I can take care of my skin in future. Regards Shikha Sharma