What are probable causes of blood in saliva?

Bleeding gums: Periodontal disease may result in bleeding gums. When mixed with saliva it often appears excessive. See your dentist to have a complete exam including a full periodontal examination.

Bloody saliva: That depends on whether the blood is truly in your saliva or just mixed in with your saliva. If it coming out of of one of your salivary ducts it needs to be checked out by an oral surgeon for a specific cause. If the blood is mixing with your saliva it may be a gingival or periodontal condition, which your general dentist or a periodontist should be able to treat.

Gum disease likely: Understanding that you need a complete and thorough exam to be sure, in the vast majority of cases, blood in the saliva would be from periodontal (gum) disease- either gingivitis or periodontitis. There are many other dental and medical causes, so it is imperative that you first see a dentist to accurately determine the cause and refer you to a physician only if necessary. The sooner the better!

Saliva: Blood in saliva can occur for a variety of reasons. Bacteria, both those normally in the human body and those that are dangerous, can lead to infections and bleeding from the mouth. If there is any trauma or damage to the mouth or associated areas, this can cause blood in saliva. Certain types of cancers can lead to blood mixing with saliva. Get your gum checked by your dentist.