Hello, Thanks for writing to us. Treatment for swollen upper lip depends on what has caused an increase in the lip size.For a chronic inflammation treatment involves intake of anti-inflammatory drugs and corticosteroids to subside swelling. Antihistamines are commonly prescribed to treat allergic reactions. Avoiding the irritant will work in favour of people suffering from contact dermatitis on the lip. Recurrent outbreaks of upper lip swelling due to neurological disorder is a rare and usually the result of contact with irritants. I do hope that you have found something helpful and I will be glad to answer any further query.