Conditions > Fever of Unknown Origin > Symptoms Conditions with Similar Symptoms as: Fever of Unknown Origin Below is a list of symptoms of this condition and the other conditions that could cause them.   chills Cellulitis Chronic Fatigue Syndrome Cough Diarrhea Endocarditis Food Poisoning Histoplasmosis Influenza Kidney Stones Lung Cancer Mumps Pelvic Inflammatory Disease Peritonitis Photodermatitis Prostatitis Shock Tuberculosis Urinary Tract Infection in Women fever Alcoholism Angioedema Appendicitis Bronchitis Bursitis Candidiasis Cellulitis Chronic Fatigue Syndrome Cirrhosis Common Cold Cough Crohn's Disease Cystic Fibrosis Diarrhea Diverticular Disease Encephalitis, Viral Endocarditis Erythema Food Poisoning Gout Heat Exhaustion Hemophilia Hepatitis, Viral Herpes Simplex Virus Histoplasmosis HIV and AIDS Hyperthyroidism Influenza Insect Bites and Stings Kidney Stones Laryngitis Leukemia Lung Cancer Lyme Disease Lymphoma Measles Meningitis Miscarriage Mononucleosis Mumps Myeloproliferative Disorders Osteomyelitis Otitis Media Pancreatitis Pelvic Inflammatory Disease Pericarditis Peritonitis Pertussis Pharyngitis Photodermatitis Proctitis Prostatitis Radiation Damage Reiter's Syndrome Rheumatoid Arthritis Roseola Roundworms Rubella Sarcoidosis Serum Sickness Sexually Transmitted Diseases Sinus Headache Sinusitis Systemic Lupus Erythematosus Thyroiditis Tuberculosis Ulcerative Colitis Urinary Tract Infection in Women Varicella-Zoster Virus Wounds headache Allergic Rhinitis Amenorrhea Anaphylaxis Anemia Bone Cancer Brain Cancer Chronic Fatigue Syndrome Common Cold Cough Encephalitis, Viral Endocarditis Fibromyalgia Food Allergy Food Poisoning Glaucoma Heat Exhaustion Herpes Simplex Virus Histoplasmosis HIV and AIDS Hypertension Hypoglycemia Hypoparathyroidism Hypothyroidism Influenza Lyme Disease Meningitis Menopause Menstrual Pain Migraine Headache Mononucleosis Motion Sickness Mumps Myeloproliferative Disorders Otitis Media Pharyngitis Photodermatitis Premenstrual Syndrome Radiation Damage Seizure Disorders Sinus Headache Sinusitis Sleep Apnea Stroke Systemic Lupus Erythematosus Temporomandibular Joint Dysfunction Tension Headache Tuberculosis Varicella-Zoster Virus malaise Candidiasis Cirrhosis Diarrhea Encephalitis, Viral Endocarditis Erythema Herpes Simplex Virus Laryngitis Measles Myeloproliferative Disorders Osteomyelitis Pericarditis Prostatitis Radiation Damage Reiter's Syndrome Rubella Serum Sickness Sinus Headache Sinusitis Thyroiditis Tuberculosis Varicella-Zoster Virus myalgia Chronic Fatigue Syndrome Herpes Simplex Virus Influenza Pericarditis

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