Answer by  
                                                                                          KMcRae (714)
                                                            
                          
                          
                                                          Depends on the cause. If your scalp is constantly itching you might want to get checked for head lice infection. This is treated with a number of over the counter medicated shampoos. Other medicated shampoos are utilized to treat dandruff which can also cause dry, itchy scalp.