A hair spa is a multi-step treatment that nourishes both your scalp and hair, celebrity hairstylist Amit Thakur, who has worked with Nita Ambani and Alia Bhatt, said. "Salons claim that hair spa helps with frizz, and yes, it could temporarily fix your frizz problem," he said. However, he claimed that it doesn't have a huge impact on controlling hairfall.