Here are some common symptoms that occur when ingesting MSG:

Commonly Reported Symptoms of MSG Toxicity
Based on books by Dr. Blaylock and Dr. Schwartz
Numbness or paralysis
Mouth lesions, sores
Swelling of hands, feet, face
Diarrhea
Mitral valve prolapse
Nausea
Arrhythmias or paroxysmal atrial fibrillation (which can lead to stroke)
Vomiting
Rise or drop in blood pressure (a fluctuation)
Stomach cramps and gas
Tachycardia (rapid heartbeat)
Irritable bowel, colitis, and/or constipation
Angina (pain in and around heart and ribs)
Swelling of/or painful rectum
Heart palpitations (change in heart beat, or irregularities, such as atrial fibrillation)
Spastic colon
Shuddering, shaking, chills
Extreme thirst
Tendinitis and joint pain, TMJ
Water retention and bloating (stomach swells)
Arthritic-like pain Muscle aches - legs, back, shoulders, neck
Abdominal discomfort
Flu-like symptoms
Asthma symptoms
Stiffness - jaw, muscles
Shortness of breath
Heaviness of arms, legs
Chest pain
Mental dullness
Tightness of chest
Depression
Runny nose and sneezing
Dizziness, light headedness
Postnasal drip
Disorientation, mental confusion, bi-polar
Bronchitis-like symptoms
Anxiety or panic attacks
Hoarseness, sore throat
Hyperactivity, especially in children (A.D.H.D.)
Chronic cough - sometimes a tickle cough
Attention Deficit Disorder (A.D.D.)
Gagging reflex
Behavioral problems - delinquency, rage, and hostility
Skin rash - hives, itching, rosacea-like reaction
Feelings of inebriation
Mouth lesions, small waxy bits in throat, tonsils
Slurred speech
Tingling numbness on face, ears, arms, legs, or feet
Balance problems
Flushing, tingling, burning sensation in face or chest
Aching teeth
Extreme dryness of mouth, "cotton mouth", or irritated tongue
Seizures, tremors
Dark circles or bags under eyes, face swelling
Loss of memory
Urological problems, nocturia, uncontrollable bladder or swelling of prostate
Lethargy
Difficulty focusing
Sleeping disorders - insomnia or drowsiness (chronic fatigue)
Pressure behind eyes
Migraine headaches - facial or temporal Eye symptoms - tired or burning eyes to blurry vision, optic neuritis
Seeing shiny lights
Neurological diseases: ALS, Parkinson's, M.S.
Burning sinuses, broken sinus capillaries
Prostate, infertility, thyroid problems
Gastro esophgeal reflux
Ear problems - tinnitus or Meniere's Disease
Cartilage, connective tissue damage
Gout-like condition (usually knees)
Gall bladder or gall bladder like problems
Kidney pain - Loin Pain
Hematuria Syndrome
Restless Leg Syndrome
Awareness During Sleep Paralysis (ADSP)

I would love some feedback on if you experiance any of these symptoms and if you have/have not found a solution to your ailment!