I Had A Very Clear Skin, But All Of A

i had a very clear skin, but all of a sudden i have this outburst of acne and dark pigmentation around the corners of my lips and chin, and the acne in some days aggravate and in some days settle down. its like all the weird stuff has happened all at once. plus i got some yeast infection on arms which makes my skin patchy and some viral on leg at the same time