What to do if i have lice on my head, so im hoping if i roll on the snow or stick my head on a pile of snow will kill them on my head?

That plan is not : Likely to work. Tx of lice requires accurate identification of nits ; / or lice. A pediculicide is usually used- otc like nix (permethrin) or rid or prescription meds like lindane or malathion. Work carefully through hair ; remove individual nits. Purchase a special lice nit comb to aid you. Check for nits ; remove as seen over the next 7 to 10 days. If there are nits after 7 to 10 days – a 2nd pediculicide.