If you feel heaviness in your head, it could be due to water which would cause Sinus.
To remove excess water from head
1. Inhale either plain steam or with vicks to relieve from Sinus
2. Place some uncooked puzhungal arisi (parboiled rice, Usna Chawal) in a light (melleesu) towel and keep it as a pillow while sleeping. It will absorb excess water from your head. This will be useful for children as they cannot take steam.