There really are no symbols that you have lice, but what you can do is look through your hair and if you find eggs then you probably have lice.
Parasitism.
I don't know if I'm just immune to lice, but I have dry scalp and my sister has lice, which I didn't get over the course of a month. Also, it seems logical. The dry scalp can prevent the lice to get to the scalp to such the blood.
Mommy lice
Head lice (Pediculus capitis) are small parasitic insects exquisitely adapted to living on the scalp of their human host. They do not live or feed on your household pets.
Lice live off the hair, the skin and blood from your scalp
It is very rare to find lice specifically in armpits. Lice typically prefer the scalp and sometimes the pubic area. If you suspect lice in your armpits, it may be best to consult a healthcare professional for an accurate diagnosis.
There is no symbiosis because there is no benefit to us. It's not a symbiotic relationship - they are parasites.
Yes, lice can cause itching on the scalp due to the bites and irritations they cause while feeding on blood from the scalp.
First... vinegar does not kill lice. Use a proper lice shampoo.
Itchy scalp
Head lice can spread from the scalp to the eyebrows, eyelashes, and beard in adults, although they are more often limited to the scalp in children.
The relationship between humans and lice is considered a parasitic symbiosis, with lice feeding on blood from the human host for survival and the human experiencing potential discomfort or irritation as a result.