- Low potassium (hypokalemia)
If the level of potassium in your blood drops below normal, it may cause low energy, leg cramps, and more.
- Viral syndrome
Viral syndrome is an unidentified cause of typical virus symptoms sore throat, stuffy nose, aches and more.
- Exercise or physical activity
Exercise is vital for good health, but overdoing it can lead to muscle aches, dehydration, headache, and more.
- Muscle strain
Muscle strain occurs when muscles are stressed, overworked, or injured due to physical activity or labor.
- Restless legs syndrome
Restless leg syndrome causes intense discomfort in your legs and an overpowering urge to move them.
- Influenza (flu) adults
The flu is a respiratory tract infection and causes fever, sore throat, runny nose, headache, cough, and more.
- Dehydration (Children)
Dehydration, or not getting enough fluid, causes dry and sticky mouth, tearless crying, and more in children.
- Hypothyroidism (adult)
Hypothyroidism your body functions slow down, making you gain weight and feel tired all the time.
- Anemia, iron deficiency
Anemia , a lack of red blood cells, can cause fatigue, pale skin and gums, brittle nails, irritability, and more.
- Dehydration (Adult)
Dehydration, or not getting enough fluid, causes low blood pressure, weakness, dizziness, fatigue, and nausea.
- Lyme disease
Lyme disease is a bacterial infection spread through tick bites; symptoms include rash, fever chills, and more.
- Coxsackie virus infection
Coxsackie virus infection can cause many cold-like symptoms as well as blisters on the mouth hands and feet.
- Lupus (systemic lupus erythematosus)
Lupus is a chronic autoimmune disease marked by swollen painful joints, a rash, swollen lymph nodes, and more.
- Multiple sclerosis
Multiple sclerosis is a disease of the nervous system causing difficulties with balance, speech, and movement.
- Sarcoidosis
Sarcoidosis is a rare disease that can cause swelling and hard lumps in the lymph nodes and organs.
- Porphyria
Porphyria is a condition that can affect the nerves and skin, making the skin extremely sensitive to sunlight.
- Anemia, chronic disease
Anemia of chronic disease (ACD) can cause fatigue, pale skin, weakness, dizziness, headache and more.
- Tick bite
A tick-related illness may cause a rash that expands out from the site of the bite, fever, chills, and more.
- Chagas disease
Chagas disease is caused by a tropical parasite and can cause fever, ill feeling, and swelling around the eye.
- Pseudohypoparathyroidism
Pseudohypoparathyroidism is a rare inherited condition that can lead to cramps, muscle spasms, and more.
- Ricin poisoning
Ricin is a dangerous poison in castor beans, and causes trouble breathing, nausea, fever and sweating.
- Anemia, hemolytic
Hemolytic anemia occurs when there aren't enough red blood cells in the blood.
- Tetanus
Tetanus is a potentially fatal toxic infection and causes stiffness in the jaw and neck, fever, and more.
- Toxic shock syndrome
Toxic shock syndrome is a serious bacterial infection and causes fever, low blood pressure, a rash, and more.
- Cat-scratch disease
Cat scratch disease is a bacterial infection caused by a cat scratch or bite.
- Mad cow disease
Mad cow disease is spread to humans by eating infected cows causing depression, anxiety, psychosis, and more.
- Bird (avian) flu
Bird flu is spread to people from birds and causes fever, cough, sore throat and muscle aches.
- West nile virus
West Nile virus is an infection spread by mosquitoes, and can cause diarrhea, fever, abdominal pain, and more.
- Endocarditis
Signs of endocarditis, an infection of the heart, include swelling, rash, sinus congestion, nausea, and more.
