IMPERIAL HIGHWAY & PIONEER BOULEVARD PROJECT - Week of March 26, 2017. Project Information. Improvements: HOV lane, one mixed-flow lane in each direction, interchange modifications at San Antonio Avenue undercrossing, Imperial Highway undercrossing, Pioneer Boulevard undercrossing and Orr and Day Road. Start Date: 2013.
Infections can cause mouth ulcers. Herpes simplex often causes mouth ulcers in children and some adults. Other less common viral and bacterial infections may cause mouth ulcers, but this is rare. Mouth ulcers can be caused by anaemia and occasionally by other blood disorders, and some skin or gastrointestinal diseases.
Answer Wiki. I read this somewhere and found it useful. Mouth ulcers can occur due to many reasons like eating acidic and spicy food, poor dental health, biting of one's cheek, food allergies, mouth injuries due to dental procedures, aggressive teeth cleaning, and even nutritional deficiency of vitamin B12 and iron.