The definition of a trajectory is the curved path something takes as it moves through space. An example of trajectory is the path taken by a paper airplane as it flies through the air. trajectory. pl. trajectory.
Lip blisters are caused by herpes simplex virus HSV-1. It may occur due to emotional stress or trauma on the lips or due to prolonged exposure to sunlight. Sometimes it may infect your eyes, fingers and even genitals. Symptoms : Fever, nausea, vomiting, headache are some of the common symptoms of lip blisters. You may have painful sores on the lips and inside the oral cavity. The area may develop inflammation and you will have difficulty to eat and drink. Sometimes, there may be sore throat.
Cracked lips are a symptom in which the lips are dry, peeling or chapped. Breaks may appear on the surface, and the lips may become painful and may bleed. In most cases, cracked lips are not caused by a serious condition and do not pose any health risks. Common causes of cracked lips include dry or cold weather, sunburn, wind exposure, licking your lips, and breathing through your mouth. In some cases, mild conditions such as the common cold, dehydration, and nutritional deficiencies may also result in cracked lips.