Essential (primary) hypertension: I10. In ICD-9, essential hypertension was coded using 401.0 (malignant), 401.1 (benign), or 401.9 (unspecified). ICD-10 uses only a single code for individuals who meet criteria for hypertension and do not have comorbid heart or kidney disease.
Symptoms & Signs. Swelling of the lips can arise due to different conditions. Trauma or injury to the lip and mouth area is an obvious cause of swollen lips. Allergic reactions, either to foods, medications, or other substances, can often be accompanied by swelling of the lips. Angioedema is a condition in which there is swelling of the tissue beneath the skin, and this is often concentrated around the eyes and lips.
Acne and pimple. Going on with swollen top lip causes, having acne or pimple can also be a cause for swollen lip, both bottom and upper, especially if you have a cystic acne which tend to be bigger and painful can cause upper or top lip pain and swelling. Acne and lip pimples tend to cause swelling on the side with the people.