"started doxycycline for 6 weeks now 100mg 2x daily. i gotta say the redness really did go down a lot. but i still have tiny red spots left. also a lot of scarring. i have acne on my nose too and my nose is taking a little longer to heal then the rest of my face. had only like 2-3 big pimple breakouts. i don&#039;t think this works on huge cyst papules/nodule type of cysts. so my dermatologist injected cortisone into a big cyst on my jawline. only effects were bad nausea but it wont happen if you eat a good meal and take it within 1hour."