Lice spreads incredibly fast, so I'd tell your parents that wewe THINK wewe have lice. Let's not completely skip to conclusions. Just go check with a doctor to make sure it's not dandruff au something else.
Tell your parents that wewe think wewe have lice and ask them for help. There's special shampoo for getting rid of lice, so, if it turns out wewe DO have lice, try some of that. Also, don't share anything that has touched your head with anyone, just to be on the salama side.
go to the pharmacy and get lice shampoo. (and if wewe live with your parents tell them. partly so they can help and partly so they dont all end up catching it too). lice wont kill wewe but its a pain in the punda in wewe dont get it treated, so do something as soon as possible.
wewe do a lice treatment (this involves your parents). This includes using the lice shampoo and then using a lice comb comb them out and pull out the eggs. wewe may have to do this once au twice before wewe get rid of them. If your case is really bad probally talk to someone professional that would know how to get rid of them.