Hello. I am suffering from suddenly darkening of my neck and armpits. The neck started many months back, but the armpit darkness started much before that. I have had eczema reactions on my neck in the past. Few people said darkness has been caused by that. The skin around my neck is not hard, it is soft and just like normal skin. But there is darkness around the perimeter. I am a little overweight, but I am exercising and controlling my diet seriously for the last month. I require some cream/ serum etc to start seeing results. Both both underarms and neck. Kindly suggest. Thank you!