Hi. I Have Developed A Dry, Red, Itchy, Scaly Type

Hi. I have developed a dry, red, itchy, scaly type rash on the backs of my knees since about the middle of October. They have progressively gotten worse since then, and have started to expand both up the back of my legs and down towards my calf. From what I can tell, it might be atopic eczema but I am not 100% sure. If it is, what is the best possible treatment to reduce this rash?