Hey Jooon, I know what you are talking about as I sometimes experience these red marks. They are a form of acne and occasionally form whiteheads but most of the time they just remain red and cause your complexion to look discoloured and patchy. It's inflammation of the skin and if you ask any derm how to treat it I'm sure they will immediately refer you to the same treatment as to someone who suffers from spots/whiteheads/blackheads. The treatment being the dreaded antibiotics which only work for short periods of time until the body has built up it's resistance. And also a/bs solve one short term problem but most likely create 2 or 3 long term problems e.g liver/kidney damage especially if taking ACCUTANE (this only occurs when taking a/bs for v.long periods of time).
I don't use antibiotics any more, it's just not worth it. I think the only way to solve your problem is to look at your diet, lifestyle and well-being. I know I know boring boring it won't do anything but trust me it will if you are willing to try. When I get red marks on my face it is usually due to something I have eaten or drunk (see my other post on alcohol). If I don't drink alcohol my skin is fine or near to being fine.
This is my advice to you:
-Have at least 3 meals a week that contain fish(salmon, mackrel & tuna=great),
-Eat almonds and walnuts as well as any other healthy nuts (not cashew/pistaccios!) maybe 10 nuts at lunch and 10 in evening everyday
-But lower your carbohydrate intake with regards to pasta,rice,potatoes etc. (these cause me to have red marks). If you want to have a 250g or > of pasta then try and do exercise afterwards.
-Don't use more than one topical cream on your face each day
-Wash face twice a day: once in morning with just water (or low anti bac.%)
and once in evening with whatever you think cleans your skin/pores. Wash gently, NO scrubbing.
-Steam your face once a week if you want
-Try and get some sunlight eachday aswell (maybe 10-20mins)
-Eat fastfood,sweets,chocs etc. ONLY a few times a month
-Oh and try not to drink alcohol (lol)
Ok this may seem like a long list and you may be thinking that there is noway it will improve your skin but it has improved my skin considerably. I'm not saying you should suddenly do all these things tomorrow. OF course not! That would be crazy. Your body prob. wouldn't be able to cope if it isn't used to it. Just gradually introduce things and in time your skin will be overall more clear. I do hope this helps you in some way or at least it may point you in the right direction....take it easy, let me know how it goes