Why do I have fever, neck lump, and numbness?

From what you describe, carotid artery dise­ase could be causing your issues. This condition blocks blood ve­ssels in your neck. It can lead to tire­dness, chest discomfort, head pre­ssure, and left arm/leg we­akness. The irregular he­artbeat, poor dental health, and skull base­ lump may relate. Reduce­d blood flow from the blockage could cause low blood pre­ssure. To properly address this, se­eking medical evaluation and tre­atment is vital.

The headaches have arisen regularly and are usually relieved by painkillers. They are characterized by stress, lack of sleep, or a bad posture, and therefore are often the case. It is necessary to trace the main cause. I suggest you engage in stress-relieving activities such as deep breathing, stretching, and getting proper sleep and posture. If the headaches still exist, it is crucial to consult a doctor to diagnose and prevent any hidden causes. 

Headaches can come from many different things. Sometimes it’s because you’re thirsty or you haven’t had enough to eat. Being stressed out or looking at screens for too long can also give you a headache. Drink some water, have a healthy snack, and take a break from screens. If the headache doesn't go away, seek medical help.

The stroker or synchronized swimming effect of water can occur after a stroke due to weakness in the throat muscles. Ask the doctor if they can refer you to a speech therapist to help improve swallowing. They may also suggest safe methods for eating and drinking. 

You might be having the pain due to the neuropathy. Therefore, I advise you to make an appointment with a neurologist who specializes in such conditions. They may recommend you some tests in order to deliver a diagnosis and a treatment plan that will help you in controlling your pain.

When symptoms disappear, it indicates that the treatment is working. For nerve problems, the patient should gradually change medication. The body needs time, usually a few months, to adjust to a new dose before considering reducing it. If you rush this process, symptoms may return.

There is no medical condition specifically referred to as a "sleep stroke." However, strokes can occur at any time, including during sleep. A stroke happens when blood flow to the brain is disrupted, either due to a blocked blood vessel (ischemic stroke) or bleeding in the brain (hemorrhagic stroke). The risk factors for stroke include hypertension, diabetes, smoking, and other cardiovascular conditions. If someone experiences symptoms like sudden numbness, confusion, trouble speaking, or severe headache, even during sleep, immediate medical attention is crucial.

People are tired for many different reasons such as not sleeping enough, stress, and underlying health problems like anemia or thyroid disease. I would recommend that he eats well, gets enough sleep, and talks to a doctor if his fatigue is not getting better because of something more serious.