- Middle ear infection
A middle ear infection puts pressure on the eardrum, causing pain and, sometimes, hearing loss.
- Labyrinthitis
Labyrinthitis, an infection and swelling in the inner ear, and may cause vertigo or hearing loss.
- Cellulitis
Cellulitis, a bacterial infection of the skin, causes red, tender skin that is usually swollen and warm.
- Medication reaction or side-effect
Medication side effects include nausea, vomiting, stomach upset, weakness, dizziness, seizures, and more.
- Aortic regurgitation
Aortic regurgitation, when the aortic valve doesn't close completely, can cause severe heart symptoms.
- Pulmonary hypertension
Pulmonary hypertension can cause shortness of breath, a fast heart rate, or lightheadedness.
- Diabetes, type 2
Diabetes can make you feel hungry, tired, or thirsty; you may urinate more than normal and have blurry vision.
- Benign paroxysmal positional vertigo (BPPV)
Benign paroxysmal positional vertigo is usually a temporary condition that affects balance and causes vertigo.
- Heart rhythm disorder
Some heart rhythm disorders can cause a fluttering in the chest, shortness of breath, chest pain or dizziness.
- Panic attack
When someone has a panic attack, that person feels a sudden, intense fear that can't be controlled.
- Generalized anxiety disorder
Generalized anxiety disorder is a condition in which a person has nearly constant anxiety.
- Dehydration (Children)
Dehydration, or not getting enough fluid, causes dry and sticky mouth, tearless crying, and more in children.
- Fainting (vasovagal syncope)
Before fainting, you might feel lightheaded, warm, nausea, a cold sweat, or have tunnel vision.
- Chemical burns
A chemical burn can cause symptoms ranging from burning and blisters to pain and shortness of breath.
- Chronic kidney disease
Chronic kidney disease is a condition of the kidneys that can cause high blood pressure, fatigue, and weakness.
- Cryptococcosis
Cryptococcosis is a lung disease causing a wide range of digestive, respiratory and cardiovascular symptoms.
- Dehydration (Adult)
Dehydration, or not getting enough fluid, causes low blood pressure, weakness, dizziness, fatigue, and nausea.
- Atrial fibrillation
Atrial fibrillation is a heart condition that causes heart palpitations, confusion, dizziness and more.
- Anemia, iron deficiency
Anemia , a lack of red blood cells, can cause fatigue, pale skin and gums, brittle nails, irritability, and more.
- Venous insufficiency
Venous insufficiency causes pain, aching, skin rashes, and swelling in the legs.
- Water retention
Water retention occurs fluid builds up in the body's tissues, causing parts of the body to become swollen.
- Aortic stenosis
Aortic stenosis is a condition of the heart causing shortness of breath, dizziness, or chest pain.
- Benzodiazepine abuse
Benzodiazepines are prescription medications that cause drowsiness, dizziness, blurred vision, and more.
- Aspirin poisoning
Aspirin poisoning is a medical emergency and can cause nausea, vomiting, drowsiness and more.
- Carbon monoxide poisoning
Carbon monoxide poisoning can be fatal, symptoms include headache, dizziness, nausea, and vomiting.
- Poison ivy, oak, and sumac
The toxin found in poison ivy, oak, and sumac causes an itchy, allergic rash with raised welts and blisters.
- Congestive heart failure
People with congestive heart failure can have shortness of breath, fatigue, irregular heartbeat and more.
- Hyperventilation
Hyperventilation is rapid or shallow breathing usually caused by stress or anxiety.
- Insect bites
Redness, swelling, pain, itching, bumps are common symptoms of insect bites.
- Insect sting
An insect sting may be followed by redness, swelling, and itching.
- Insulin reaction (hypoglycemia)
An insulin reaction is the result of low blood sugar and causes anxiety, hunger, shaking, dizziness, and more.
- Supraventricular tachycardia
Supraventricular tachycardia is fast heart rhythm starting in one of the upper chambers of the heart.
- Abscess
A skin abscess, or boil, is a swollen, painful, red and warm lump of skin that may rupture and drain pus.
- Acute kidney failure
Acute kidney failure is sudden and can cause swelling, frequent dark urination, fatigue, nausea and more.
- Anemia
Anemia, a lack of red blood cells, can cause fatigue, pale skin, weakness, dizziness, headache and more.
- Anemia, chronic disease
Anemia of chronic disease (ACD) can cause fatigue, pale skin, weakness, dizziness, headache and more.
- Heat exhaustion
Heat exhaustion causes intense thirst, heavy sweating, pale, cool, and moist skin, muscle cramps, and more.
- High blood pressure (hypertension)
High blood pressure, often asymptomatic, can cause headaches, shortness of breath, nosebleeds, and anxiety.
- Meniere's disease
Meniere's disease is a chronic inner ear condition that causes vertigo or extreme dizziness, and more.
- Bunions
A bunion is a bony bump at the base of the big toe and causes redness, numbness, burning and joint pain.
- Corns and calluses
Corns and calluses are areas of thick, hard skin on the hands and feet.
- Diabetes, type 1
Diabetes can make you feel hungry, tired, or thirsty; you may urinate more than normal and have blurry vision.
- Glomerulonephritis
Glomerulonephritis is a type of kidney disease and causes swelling, abnormal urine, fever, achiness, and more.
- Rheumatoid arthritis
Rheumatoid arthritis is an autoimmune disease that causes pain, swelling, and joint damage.
- Thrombophlebitis
Blood clots in the leg can become very dangerous; symptoms include swelling, redness, and leg tenderness.
- Transient ischemic attack (mini-stroke)
Transient ischemic attacks cause headache, numbness, tingling, or weakness in the face, arm, or leg, and more.
- Osteomyelitis (bone infection)
Osteomyelitis is an infection of a bone that causes pain, swelling, and redness.
- Burn (heat or fire)
Burns caused by heat are called thermal burns and can cause pain swelling, skin changes, blisters and more.
- Chagas disease
Chagas disease is caused by a tropical parasite and can cause fever, ill feeling, and swelling around the eye.
- Small intestine cancer
Small intestine cancer is rare and often has no symptoms, but can cause symptoms in its advanced stages.
- Anemia, hemolytic
Hemolytic anemia occurs when there aren't enough red blood cells in the blood.
- Cyanide poisoning
The symptoms of cyanide poisoning include headache, weakness, confusion, nausea, and seizures.
