Suffered for years. Skin has been worse than ever in the last few weeks and was just about to go back to the doctor when I chanced upon an article about blue light treatment. Ended up investing in an at home device and 2 weeks in, I am so impressed. All the anger has gone from my spots and within a couple of days of using it, everything had calmed right down. The one I bought has got a 45 day guarantee from Amazon but I doubt I'll be sending it back.