A tractor unit pulling a semi-trailer. A truck pulling a semi-trailer using a trailer dolly. A semi-trailer is a trailer without a front axle. A large proportion of a semitrailer's weight is supported by a tractor unit, a detachable front axle assembly known as a dolly, or the tail of another trailer. A semi-trailer is normally equipped with landing gear (legs which can be lowered) to support it when it is uncoupled.
Bleeding, redness, and painful or sore gums can be a symptom of gingivitis (inflammation of the gums) that arises due to a number of different causes. Bleeding of the gums is sometimes referred to as gingival bleeding, and it may occur during brushing or flossing. The soreness can be accompanied by swelling of the gum tissues. Most commonly, gingivitis is the result of plaque buildup on the teeth around the gum line.
Gum Disease can be a wide variety of infections that can cause pain, discomfort or bleeding in the mouth. Gum disease can make gums bleed, be sore or have pain. These are all signs of gum disease, like gingivitis. Gum disease can be something from gingivitis to even an abscess gum. Both of these can cause discomfort or even bleeding at times. Gum Disease can be dangerous since the mouth has some correlation with the heart. Gum disease can put more stress on the heart, especially if there is an infection within the mouth.