Head and neck cancer produces different symptoms depending on where it starts, but the most common warning signs are a mouth sore that won’t heal, persistent hoarseness, difficulty swallowing, and a painless lump in the neck. These cancers can develop in the mouth, throat, voice box, sinuses, nasal cavity, or salivary glands, and each location has its own pattern of symptoms. Many of these overlap with common, harmless conditions, so persistence is the key factor: symptoms lasting longer than two to three weeks without improvement deserve medical attention.
Mouth and Lip Symptoms
Cancers of the oral cavity, which includes the lips, gums, tongue, and the lining of the cheeks, tend to produce visible changes you can spot yourself. The most recognizable sign is a sore or ulcer in the mouth that refuses to heal over several weeks. Lip cancer often appears the same way: a persistent sore on the lip, sometimes with bleeding or pain.
Other oral symptoms include white or reddish patches on the inside of the mouth, unusual bleeding or pain, swelling in the jaw, a lump or thickening in the cheek or gum tissue, and loose teeth that weren’t loose before. Some people notice their dentures no longer fit properly. Tongue cancer can grow as a raised or deep lesion that may feel like a firm spot when you run your tongue along the area.
Throat and Swallowing Problems
Cancers in the pharynx (the back of the mouth and upper throat) often cause a persistent sore throat that doesn’t respond to typical treatments. You might feel like something is stuck in your throat, a sensation doctors call globus. Chewing and swallowing can become painful or difficult, and some people develop trouble breathing or speaking clearly. Pain or ringing in the ears, or a noticeable change in hearing, can also signal a problem in this area.
These symptoms are easy to dismiss as a lingering cold or seasonal allergies. The difference is that cancer-related throat symptoms don’t cycle through and resolve the way infections do. They either stay constant or gradually worsen over weeks.
Voice Changes
The most common symptom of laryngeal (voice box) cancer is hoarseness that doesn’t improve after a few weeks. It’s easy to write off as a cold that’s hanging on, but a voice that stays raspy, breathy, or strained for more than two weeks needs evaluation. Pain when swallowing and ear pain on one side are also common with voice box cancers.
Nasal and Sinus Symptoms
Cancers in the nasal cavity and sinuses can mimic chronic sinus problems, which makes them tricky to catch early. Blocked sinuses that don’t clear, sinus pressure that doesn’t respond to antibiotics, and recurring nosebleeds are the hallmark signs. A sore or lump inside the nose that won’t heal is more specific to cancer and less likely to be confused with a routine sinus issue.
As sinus or nasal cavity tumors grow, they can press on surrounding structures. This may cause headaches, numbness or tingling in the face, swelling around the eyes, double vision, or pain in the upper teeth. Dentures that suddenly stop fitting well can also be a clue, since tumors in the roof of the mouth or upper jaw change the shape of the tissue.
HPV-Related Throat Cancer
HPV-related throat cancer, which most often affects the base of the tongue and tonsils, presents differently from cancers caused by tobacco and alcohol. The most common first symptom is a painless lump in the neck, which means the cancer has already spread to a lymph node. Unlike other throat cancers, which typically cause pain early, HPV-related cases can grow silently for longer before causing discomfort.
This presentation leads to frequent misdiagnosis. MD Anderson Cancer Center notes that the neck swelling is sometimes mistaken for an infection, leading to multiple rounds of antibiotics or even unnecessary tooth extractions before the real cause is identified. These lumps can feel cystic (fluid-filled) and may be confused with benign cysts. Despite having already reached a lymph node, HPV-related throat cancer is still classified as stage I, reflecting its significantly better prognosis compared to HPV-negative cancers at the same point of spread.
Salivary Gland Symptoms
Salivary gland cancers most commonly appear as a painless lump in or around the mouth, jaw, or just below the ear. What distinguishes a potentially cancerous lump from a benign one is how quickly it grows and whether it comes with additional neurological symptoms. Weakness, numbness, or pain in the face, neck, or jaw suggest the tumor may be affecting nearby nerves. Difficulty opening your mouth fully or moving your facial muscles is another warning sign specific to this type.
Rapid enlargement of a lump that’s been present for a while is particularly concerning, as it can signal a benign mass that has turned malignant.
Signs of Advanced Disease
As head and neck cancers progress, symptoms tend to intensify and new ones appear. Coughing up blood, significant unexplained weight loss, and a non-healing sore on the skin of the face or neck are signs that the disease may be more advanced. Ear pain on one side, called referred pain, is common across several types of head and neck cancer because the nerves serving the ear also pass through the throat and mouth. Persistent ear pain without an obvious ear problem is worth mentioning to a doctor, especially alongside any other symptoms on this list.
The difference that early detection makes is dramatic. For oral cavity and pharynx cancers caught while still localized, the five-year survival rate is roughly 89%. Once the cancer has spread to distant sites, that drops to 36%.
How Long to Watch Before Getting Checked
The general rule of thumb is two to three weeks. A mouth ulcer that hasn’t healed after three weeks, hoarseness lasting more than two weeks, or a neck lump that persists for two weeks all meet the threshold for medical evaluation. UK cancer referral guidelines recommend an urgent appointment (within two weeks) for an unexplained oral ulcer lasting more than three weeks or a persistent, unexplained neck lump.
An initial evaluation typically involves a physical exam of the mouth, throat, and neck. Your doctor will feel for lumps in the neck, checking whether lymph nodes are firm, mobile, or fixed in place. If anything raises concern, you’ll be referred to an ear, nose, and throat specialist for a more targeted examination, which may include a scope passed through the nose to visualize the throat and voice box directly. From there, imaging and a biopsy confirm or rule out cancer.
The overlap between these symptoms and everyday conditions like colds, allergies, and dental problems is exactly why head and neck cancers are often caught later than they need to be. Paying attention to duration, not just severity, is what separates a symptom worth watching from one worth acting on.