Tips to Add Long-Lasting Volume to Thin Hair 

2. Blow-dry your hair upside down

One of the main reasons why your hair tends to look flat is that the hair follicles are settled comfortably in one position on the scalp. Blow-drying your hair upside-down will provide a hair-raising experience. This technique lifts your hair, it also dries hair so it flows away from the scalp, adding volume to fine hair. This process delivers fresh blood to your scalp.