My son has a recurring problem with this and we have tried everything, from natural preparations through to the chemical treatments, to no avail.
Headlice are greyish/transparent in colour, and are only about the size of a sesame seed.
Contrary to popular belief, they don’t have the ability to hop from head to head, rather they crawl from heads, pillows, or furnishings onto the heads of unwitting hosts.
The nits/eggs are quite a bit smaller than the actual lice, and can be found attached to the hair shaft, usually right at the base near the scalp, though in severe cases they can be found at any point along the hair.
Once headlice have firmly established themselves in your household, even if it is only on the head of a single member, they can take a lot of work to eliminate completely.
Adult headlice can live for up to five weeks, and the females lay four to five eggs daily, which is why a headlice problem can quickly get out of hand.
Stronger solutions aren’t necessarily more effective, with the very best elimination method being the painstaking removal of all adults and eggs by hand.
Everyone in your family will need regular head-checks, and since the eggs hatch around seven to eight days after being laid, you will need to perform treatments weekly for at least two to three cycles.
Lice can crawl onto heads from bedding, soft furnishings, and headwear. Anything that can be put through a hot wash and dryer cycle should be.
You can often find essential-oil based sprays at health stores to use on furnishings and non-washable items.
Any hairbrushes and hair accessories should also be soaked in hot water with tea-tree or eucalyptus oil added.