Causes of Enlarged Submandibular Lymph Nodes
Jan 11, 2021
Source: Cainiu Health
Dr. Liu Guoqiang
Introduction
Causes of submandibular lymphadenopathy:
1. Bacterial infection—acute inflammation leading to submandibular lymph node enlargement;
2. Oral diseases—such as oral ulcers, periodontitis, gingivitis, and pericoronitis;
3. Tuberculous lymphadenitis—caused by Mycobacterium tuberculosis infection affecting the submandibular lymph nodes;
4. Acne—serving as an indicator of underlying inflammation; typically resolves once the inflammation subsides.
Enlargement of the submandibular lymph nodes without pain is generally considered benign lymphadenopathy and typically does not require treatment at this stage. So, what are the possible causes of submandibular lymph node enlargement? Below we provide an overview.
Causes of Submandibular Lymph Node Enlargement
1. Bacterial Infection
Acute inflammatory conditions commonly cause submandibular lymph node enlargement. Such enlarged lymph nodes are usually mobile and soft in consistency, and they tend to regress spontaneously as the underlying inflammation resolves.
2. Oral Diseases
Oral conditions—including aphthous ulcers, periodontitis, gingivitis, and pericoronitis—can trigger rapid enlargement of the parotid and submandibular lymph nodes due to bacterial stimulation. These cases often present with classic signs of inflammation: redness, swelling, warmth, and tenderness.
3. Tuberculous Lymphadenitis
Nonspecific infections—particularly those caused by Mycobacterium tuberculosis—are relatively common. Tuberculous submandibular lymphadenitis has a relatively high incidence in clinical practice. It typically manifests as painless submandibular lymph node enlargement, often accompanied by low-grade fever.
4. Acne
Acne may also lead to enlargement of the submental or submandibular lymph nodes, serving as an indicator of localized inflammation. The lymphadenopathy usually resolves once the inflammatory process subsides. However, it is important to distinguish acne from lymph node enlargement: lymph nodes lie beneath the skin surface and can be palpated and moved freely under the skin.
The above outlines the common causes of submandibular lymph node enlargement. We hope this information is helpful to you.
