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.
Causes of Mouth Ulcers or Sores. 1  Canker Sores. The main cause of 1 or 2 mouth ulcers after age 5. 2  Hand-Foot-Mouth Disease. The most common cause of multiple ulcers in the mouth. 3  Herpes Simplex Virus (Cold sore virus). The first infection can be severe. 4  Cold Sores (Fever Blisters). Sores are only found outside the mouth on the outer lip. They recur 2 or 3 times a year in the same place. There are no ulcers inside the mouth. Adult cold sores are the cause of Herpes Simplex infections in young children. Occurs in 20% of teens and adults.