Lice eggs are usually visible. They look like tiny little white balls sticking to the hair follicles. I don't think they would usually cause lesions on the scalp unless they were a very heavy infestation - enough that you would not be wondering if they were there. Whether you have parasites causing that problem or not I do not know. (Maybe try some Iodine on them, maybe alternate with hydrogen peroxide, but search the net to see if other people have the same thing & know the cause & cure maybe.)
Chances are very good you have some kinds of parasites lurking inside, sad to say, however.

See link below for cayenne pepper challenge test to see if you or any loved ones have Tapeworms (sometimes one sees sesame seed looking things, or “blanched almonds” but usually “white rice” in the stools), for example. Many people have found parasites this way, parasites that lab tests said they didn’t have. Hulda Clark says everyone she ever lab tested had Tapeworms & everyone had other kinds of parasites as well.
What helped me in case any of it can help you:
//www.curezone.org/forums/fm.asp?i=1522290#i


Another approach to tapeworms, also ascaris:
//www.curezone.org/clark/ascaris.asp


RE parasites, low enemas can help reveal what bugs are dying without any “digging around.” Enema bags are cheap & online or at drug stores. The net has many sites telling how to use them. Use 2 cups filtered water only per bag at a time. You don’t want to go too high and wash away good intestinal bacteria. (On occasion, to relieve really bad constipation, you can go higher, though. Preferably less than one time per week.) Add some plain, no sugar, yogurt with acidophilus, or “live cultures” to the last bag & eat some. This kind of yogurt is easy to find at most grocery stores. The enemas can also help combat the constipation often associated with initial stages of parasite killing and just help speed up the cleansing process in general.

Also, many people are not aware that they are gluten sensitive, maybe even have celiac. A gluten sensitivity test can help. Even if one shows up just at Level 1 in sensitivity, that means the intestinal villi have been damaged & nutrients are not getting through as they should. Also where gluten sensitivity is, candida is probably lurking.

Candida may be lurking regardless. One way you may find it is by doing low enemas, mixing water with apple cider vinegar or 3% hydrogen peroxide. Use after a bowel movement. If you see things that look like string cheese or yellow gel, or white things that look like pieces of tissue paper, then you know a candida cleanse needs to be done. I'd personally get rid of the parasites first. Both cleanses cause die off and you don't want to overdo it.

Some of the causes could be:
Lice, Mites, allergy, infected rash, fungus infection such as ringworm, gluten sensitivity.

I had itchy bumps and rough scaley skin on my scalp for years. Only once I did have lice. The rest of the time the bumps were a result of autoimmune gluten sensitivity (Celiac Disease).

You could try treatments for lice and mites.
Use a saturated solution of borax for hair and skin washing. No shampoos or other hair care products. Wash bedding with borax, no detergents.
See Celiac.com information pages for Celiac Disease testing if the other remedies don't work.

Have you changed your shampoo or conditioner, or any hair products lately? I used to get pimples on my scalp when I used hair gel. Stopped using it, they disappeared. I'm very sensitive to certain things, and I can't use any kind of OTC hair conditioner, only coconut oil. Anything other than shampoo that I put on my head makes me get pimples on my scalp, then I want to pop them, and they scab over. If I pick at them, they bleed. It could be parasites, or as simple as a reaction to your hair care products.