coldsores or fever blisters

After we have really hot weather or really cold weather a nice sunshiny day will occur and I will get sores on my lips that spread to two or three spots and they hurt like nobodys business or these coldsores or feverblisters caused by the sun bringing out a virus in my system?

[BhumikaMD]

Hi,

Cold sores are caused by the herpes simplex virus, and they're contagious. Signs and symptoms of cold sores include:
-Small, painful, fluid-filled blisters on a raised, red, painful area of your skin
-Pain or tingling, called the prodrome, often precedes the blisters by one to two days
-Usual duration of seven to 10 days

Cold sores usually appear on your lips. Occasionally, they occur on your nostrils, chin or fingers.

Cold sores generally clear up without treatment in seven to 10 days. If you experience frequent bouts, your doctor may prescribe an antiviral medication to treat cold sores.

Let us know if you need any further information.

Regards.

[Jellytot16]

I have been ill with Tonsillitis and i have had a high fever over 38'C. I still have Tonsillitis, and all of a sudden 2 or 3 little white coldsores have popped up on just my bottom lip. In the last 2 hours since i have been taking the antibiotics prescribed by my doctor. Are these cold sores or something worse? Please help as i am quite scared at the moment. They are like little white pimples on the inside of my bottom lip.