I have a black patch on my fore head, It becomes more when i go out to sunlight. it there since 2-3 years , recently it has become too much. I consulted skin specialist she suggested some medicine. i continued it for abt a year but it did not give me results can you sujjest me some sollutions to remove tan at that part of the face.

I also have a lack of memory which is increasing day by day

my age is 23 and weight 65kgs, height 5.4