Dermatology question: is it true that chocolate or junk food will cause your skin to break out?

Food won't make acne: For society as a whole, diet doesn't matter when it comes to acne. For individuals, some foods may cause break outs. There are questions about whether foods with a "high glycemic load"- white rice, potatoes, etc. Can cause worsening of acne- but this is a debatable topic. Same with pizza- they found increased pizza intake and stress during final exam times in colleges with increased acne.

In some people: Some people find that certain foods make them break out more. If you notice a direct correlation then it would be prudent for you to avoid that food if you don't want to keep breaking out. There is no certain food group that is universally known to cause breakouts--just individual hypersensitivities. All types of foods (ie: fried, chocolate, junk food, dairy products) have been implicated.

There are new links: between food and acne. If you find your acne gets worse with certain foods then I would avoid them

NO: Any effect is very small. Diet is very important for other reasons, but not because of acne. Adult women have acne because of hormones, sometimes meds. A dermatologist will help you, probably with spironolactone.