Yes you can wash head 2-3 times a week otherwise the scalp will become dirty and dandruff may develop. In summers, I wash my head twice with Thriveco hair vitaliser shampoo and conditioner combo. It not only keeps my scalp clean for long time but also promote growth of new roots on scalp.

Hey hema, the feeling is actually fine during summers this is bound to happen. You can use any mild shampoo free of chemicals to wash your hair. U can use thriveco

Yeah same with me specially in summers and I wash my hair thrice a week with ThriveCo Vitalizing shampoo which is really mild and cleans the scalp making the hair soft and manageable.