I got this itchiness on head for week olredi. And I had few lice taken out. Could shampoos cause that? What to do? I'm working.

Polyp. what you have in the tweezer is a polyp or lipoma it contains either sebacious material or fat no this is not caused by lice or its shampoo it should not hurt you unless the comb or brush causes it to bleed and then it should be checked and removed.