I also have burning lips, and have experienced this periodically over the past few years, and have never developed mouth sores. Does this have any sort of connection to the recurring "canker sore?"
Are you perhaps biting your tongue on the same spot, that turns into a canker soar? Are you getting burning sensations on the corner of your lips? When do you feel burning the most, when you wake up in the morning perhaps?
This isn't herpes. There are various viruses that cause mouth ulcers, and they always heal on their own. To speed up the healing, spread some milk of magnesia on the area several times a day. This protects the tongue from further irritation, and allows you to eat and drink more comfortably. If you are getting them always on the same side, it could be food related. We all tend to chew more on one side than the other, so pay attention to how and what you have eaten just prior to getting these. If it continues, see your doctor although it's nothing serious if it comes and goes.
Mammo is right , and also canker soars can appear when you are stressed out, immune system is down. Don't sleep one night, not only you'll get canker soars, a cold , and herpes can show up too. In your case, herpes is not in your body, at least you don't have to be worried about that. Also check for a sharpness on a tooth, a filling , or a crown , that can at times hurt your tongue, and then cause a canker in some people , since you said it appears in the same spot. Maybe mammo can tell you from experience, other than the lip, I have seen herpes lesions on the gums, on the hard tissue and nor the soft. That includes the hard palate. It's very distinct, it looks like a bunch of red poky dots , different that how it looks on the lip. There are poky dots that can appear on the soft palate , that can look exactly like herpetic lesions, if they don't hurt, that's not herpes, it's from a non bacterial or viral origin , and I am not going to tell Mammo what it is!