What can u do for fever blisters?

Usually endure!: These are a nuisance. There are topicals to put on them that are over the counter. Your pcp can prescribe topicals and oral medications to treat and help prevent them. These meds are usually anti-virals. They are known to recur and painful, itchy, unsightly and can become problematic. If it is more than a simple case, see your pcp and discuss. Google a reputable web site for more information.

Heat: I was an investigator in a large multi-site clinical trial on herpes i, and it was concluded that heat actually deactivates the virus. Temperatures slightly above normal are sufficient, and this can be achieved for example by using a heated cup persistently on emerging lesions. The device used in the trial was patented by a non-us company, and can be found on the -net for approx $75.