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.
Causes of Swelling in the Upper Lip. Lips are very delicate and are prone to injury. Any big or small injury like a punch on the mouth, or a bad fall on the face, or biting of the lip while eating can trigger swelling on the upper lip. It can happen due to an allergic reaction.