Just about 20 minuets ago my bottom lip started to swell..it hurts but its red and its getting bigger and bigger...for the past couple of days my lips were itching really bad i thought ...it was because they are dry now there swelling....why is this happening to me? what is it?

The easiest home remedy is to apply hydrogen peroxide with a cotton swab on the canker sore (1 part hydrogen peroxide to 1 part water). Then dab a small amount of milk of magnesia on the canker sore 3 - 4 times a day. This is not only soothing, but appears to help healing.
You probabley have an STD, you dirty cow.
Three weeks ago I had awaken with a swollen bottom lip, and it itched intensely for about 2 hrs or so! My lip was the size of a small peach, and I could feel it "trying" to get bigger. It lasted for about three days. I haven't had sexual contact nor prolonged physical contact (more than a 2s handshake) with anyone in more than six months and I have NO STDs, and never have. But, I have recently purchased a brand new bed, and about 4 or so weeks a ago I slept on someone's couch. Anyhow, the swelling subsided, but about 3-4 days later I awakened while on a business trip. I could feel my top lip swelling, and it did, but this time no itching. It lasted 2 days. This morning (a whole week later), I was awakened by my top lip swelling again. This time it was under my top lip and not the outside. It is an allergy, but its unclear as to the trigger. I suspect a reaction to mites present in the pillow and bedding. Maybe the Sarcoptes Scabei, "scabies", or as I call them "The Cooties". I noticed skin "tracks" and intense itching behind my knees and in my arm pits back when the first swollen lip problem happened. I was taught they weren't supposed to go after your face. I've just recently started using left-over 12 yr old lotion prescribed by an African biochemist. He was the father of the woman I was dating. I had a skin fungus called Tinea Versicolor. Anywhere I've used it NOW the itching is controlled and the rashes don't seem to be spreading. I don't know if its consumable (or can be used on or in lips).The lotion is Selenium Sulfide 2.5%%. Ask your dermatologist if you are getting the other skin issues. I suspect that something similar can be used on the mouth. I have also found that certain weight loss products have STRONG anti-inflammatory drugs(multiple forms of caffeines and derivatives) in them. Omega-3s, capsaicin(from chili peppers) and garlic are also supposed to help. A double dose of Benedryl didn't help with my lip swelling, but one full dose of Lipo-6 knocked the swelling down within a couple of hours. This time I took something called "Dren". Let's see what happens.