Myasthenia Gravis: A Comprehensive Guide

Primary Symptoms

• Drooping eyelids (ptosis) - One or both eyelids may droop, especially when tired

• Double vision (diplopia) - Seeing two images instead of one, particularly when looking to the sides

• Difficulty swallowing - Food may feel stuck in the throat or come back through the nose

• Slurred or nasal speech - Voice may sound weak, hoarse, or have a nasal quality

• Facial muscle weakness - Trouble with facial expressions, chewing, or closing eyes completely

• Arm and leg weakness - Difficulty lifting objects, climbing stairs, or walking long distances

• Breathing problems - Shortness of breath or difficulty taking deep breaths

Muscle weakness often comes and goes throughout the day. You might feel fine in the morning but tired by afternoon. Some people notice their symptoms get worse when they're stressed or sick.

The eyes are often the first place people notice symptoms. About 40% of people with myasthenia gravis start with eye problems. In some people, weakness that begins in the eyes later affects other muscles, so new or worsening symptoms should be discussed with a doctor.

When to Seek Care

Watch for signs that indicate your condition may be worsening. These include increased difficulty swallowing, new breathing problems, or sudden worsening of muscle weakness. Changes in speech or vision also need prompt attention.

If you notice new symptoms appearing, don't wait to tell your doctor. Keep track of when symptoms happen and what you were doing. This information helps your doctor adjust your treatment plan.

When to Seek Immediate Care

Contact emergency services immediately for new or worsening trouble breathing, choking, inability to swallow saliva, or rapidly worsening weakness. Severe eyelid weakness should be assessed promptly, but by itself does not usually indicate a myasthenic crisis. New or worsening trouble breathing, choking, inability to swallow saliva, or rapidly worsening weakness may signal a myasthenic crisis requiring urgent treatment.

Medical History & Physical Examination

Your doctor will ask detailed questions about your symptoms, including when they started and what makes them better or worse. They'll want to know if weakness affects specific muscle groups or changes throughout the day. The physical exam focuses on testing muscle strength, eye movements, and reflexes.

During the exam, your doctor may have you perform repetitive movements to see if muscles get weaker with use. They'll check for drooping eyelids, double vision, and facial weakness. Doctors also consider other conditions that can cause muscle weakness when evaluating these findings.

Be honest about all your symptoms, even small ones that seem unimportant. Tell your doctor about family members with autoimmune diseases. Share what medications and supplements you're taking.

Diagnostic Testing

• Blood tests - Check for antibodies that attack acetylcholine receptors or other muscle proteins

• Electromyography (EMG) - Measures electrical activity in muscles to detect nerve-muscle problems

• Nerve conduction studies - Test how well nerves send signals to muscles

• CT or MRI of chest - Look for thymus gland abnormalities or tumors

• Other tests may sometimes be used when the diagnosis remains uncertain. Edrophonium testing was used historically but is now rarely performed because of medication risks and limited availability.

These tests are generally safe, but blood sampling and some electrodiagnostic tests can cause discomfort. Your doctor can explain the risks and what to expect from each test. Your doctor may need to do several tests to confirm the diagnosis. Some tests show results right away while others take a few days.

Conservative Treatments

• Cholinesterase inhibitors - Medications like pyridostigmine that improve nerve-muscle communication

• Corticosteroids - Anti-inflammatory drugs that suppress the immune system response

• Immunosuppressants - Drugs like azathioprine or mycophenolate that reduce antibody production

• Activity modification - Pacing activities and taking frequent rest breaks to manage fatigue

Most people start with the gentlest treatments and add more only if needed. Your doctor will watch how well each medication works. You might need to try different drugs to find what works best for you.

It's important to take medications exactly as your doctor tells you. Don't stop taking them without talking to your doctor first. Missing doses can cause your symptoms to suddenly get worse.

Advanced Treatments

• Plasmapheresis - Blood filtering procedure that removes harmful antibodies from circulation

• Intravenous immunoglobulin (IVIG) - Infusion of healthy antibodies to block harmful ones

• Thymectomy - Surgical removal of the thymus gland; it is required when a thymoma is present and may benefit selected people with generalized myasthenia gravis, depending on antibody status, age, and other factors

• Monoclonal antibodies - Newer targeted therapies like rituximab for severe cases

Plasmapheresis and IVIG can improve symptoms relatively quickly. Benefits from thymectomy may take months or longer, and the timing and risks of targeted therapies vary. Plasmapheresis, IVIG, and targeted therapies are often used for serious symptoms or when other treatments are insufficient; thymectomy may instead be indicated because of a thymoma or selected clinical factors. Your doctor will discuss whether these options are right for you.

Newer medications are being developed all the time. Some people benefit greatly from these advanced treatments. Talk with your doctor about which treatment plan makes sense for your situation.

Daily Management Strategies

Plan your most important activities for times when you feel strongest, usually earlier in the day. Take regular rest breaks before you feel tired. Keep a symptom diary to identify patterns and triggers. Use assistive devices like jar openers or electric toothbrushes when hand strength is limited.

Many people find that avoiding stressful situations helps control their symptoms. Talk to family and friends about your condition so they understand your needs. Ask for help when you need it instead of pushing yourself too hard.

Organize your home to make daily tasks easier. Keep things you use often at waist level so you don't have to reach up. Use a shower chair if standing in the shower tires you out.

Exercise & Movement

Stay active with low-impact exercises like swimming, walking, or gentle yoga. Avoid activities that cause extreme fatigue or overexertion. Work with a physical therapist to develop a safe exercise plan. How quitting smoking improves your health is especially important since smoking can worsen breathing problems in myasthenia gravis.

Exercise helps keep your muscles strong even with myasthenia gravis. Just be careful not to overdo it, as too much activity can make symptoms worse. Start slowly and build up gradually.

Talk to your doctor before starting any new exercise program. Your physical therapist can teach you special exercises that help without making you too tired. Stretching before and after exercise prevents stiffness.