I am suffering from nodular acne. I had previously prescribed this with doctor in my locality. He said me to take isotretinoin tabs for 3 months so I did completed the course. But 4 months after the completion of course it again started to appear on my face as well as other parts of my. Body. What shall I do for this. And especially they appear In start of rainy season which is June and July. Please help me with this.