My kids got this a few times; I used a biological shampoo. Get advice for which type as I don't know which are available in your country. Forget anything about dryblowing- won't work.
DO get rid of all the nits, using a good light (they are tricky critters to find) and bed clothes straight after washing!! They (the nits) have the shape of tiny grains and have a silvery sheen.( I had to use the end of my nails because my kids have real thick hair, and the nit comb was a little cumbersome. Yes, gross)! They grow close to the root of the hair. The stuff you use on your hair won't kill the nits, even though you are told it will. I know this to my cost! Get rid of them all.
The lice can change their colour to adapt to the colour of your hair. E.g., if you are blond, the lice will be lighter.
You can vacuum all floor surfaces ( throw away the bag), wash the clothes and bed clothes you have been using whilst infected at 60° C, put objects like brushes, combs, etc., in the freezer, or in a sealed plastic bag for, I think 2 weeks, so any nits that hatch will starve (ha ha!).
Good luck!