Hi sir...
Hay fever is the reason for your swollen lips...
Hay fever cause mouth breathing and it leads to dry mouth,gum soreness ..
Treatment of Hay fever:
**Anti histamines
**Decongestants
**cromyln sodium
**Leukotrein modifier
**oral corticosteroids...
It may take several weeks to get rid of hay fever ....It lasts as lons as you contact with the allergens ..
kindly take Anti histamines for few weeks to get rid of this
Next Steps
kindly visit general physician and pulmonologist also for furthur consultation