Hi. I am a girl in her 20’s and I have a huge forehead . I didn’t know it was that bad until I recently went to a wedding and had it on display . I kept getting looks and people were indirectly mentioning it to me all night . I now feel so insecure and am suffering from bad anxiety. Please help.
LemonVibe 
Go visit a dermatologist. They will be better able to classify if you have a hormone imbalance or adult onset acne.
I also have a big forehead compared to the rest of my face. If it really bothers you, try contouring or heightening your eyebrow arches with makeup, getting bangs, or consider investing in a forehead reduction. The one that worked for me is getting two side-bangs to frame the top and sides of my face.
I used to be insecure about it, but now, it’s reached the point that I don’t care if my forehead looks big whenever I wear my hair up in a ponytail. You just gotta remember that some people have worse bodily flaws/insecurities, thank god ours is just our forehead!
Own it! Appreciate your individuality and unique look. Beauty standards are always changing throughout time, I bet at one point big foreheads were probably an attractive characteristic: symbolizes intelligence, mental capacity, etc. Regardless of what other people think, appreciate your beautiful differences.