Sevre burng sensatn 4head. Guide me.

Hi, I am having severe burning sensation on my forehead since more than 16 years. Other than homeopathy, I have not consulted or taken any medication for this problem. As a daily routine, I use "Calrose" lotion on my face. This burning sensation was manageable until now but, since the climate is too hot this time, I am facing a lot of burning sensation and the area turns out dark and sometimes severe rashes can be seen if I expose my forehead directly under sunlight or if I sweat. During winter too, I have burning sensation with slightly darkness on my forehead when exposed to sunlight or sweat. I would request if anyone expertised in this sort of case, who can guide me with a good affordable treatment or with any recommended cream or lotion that could cure this kind of problem will be greatly appreciated. I am attaching the pic. Please guide me. Thanks in advance :)