In-depth

Acute kidney failure

Amyloidosis

Amyotrophic lateral sclerosis

Amyotrophic lateral sclerosis (ALS) — often known as Lou Gehrig's disease — is a degenerative condition causing loss of control of voluntary muscles.

Anaphylaxis

Anaphylaxis is the most serious type of allergic reaction. It often occurs rapidly after exposure to an allergen and may be life-threatening.

Anterior prolapse (cystocele)

Appendicitis

Ataxia

Ataxia describes lack of muscle coordination while performing voluntary movements. A sign of an underlying condition, ataxia can affect any part of your body.

Back pain

Bed-wetting

Benign prostatic hyperplasia (BPH)

Bipolar disorder

Bladder stones

Bladder stones are small masses of minerals in your bladder — often forming as a result of an enlarged prostate, nerve damage or infection.

Blood in urine (hematuria)

Castleman disease

Cervicitis

Chlamydia

Are you worried you might have chlamydia? Find out how this common sexually transmitted infection is diagnosed and treated.

Chronic daily headaches

Chronic kidney disease

Chronic kidney disease, often caused by diabetes or high blood pressure, is the gradual loss of kidney function. Early detection and treatment can help.

Congenital adrenal hyperplasia

Congenital adrenal hyperplasia is a genetic condition affecting the adrenal glands and interfering with normal growth and development in boys and girls.

Cyclothymia (cyclothymic disorder)

Cystitis

Dehydration

You normally lose about 10 cups (2.4 liters) of water every day — much more during exercise or illness. Learn how to stay hydrated.

Delayed ejaculation

Delirium

Diabetic ketoacidosis

Dysarthria

Edema

Epididymitis

Erectile dysfunction

Febrile seizure

Heat exhaustion

Heatstroke

Hemolytic uremic syndrome (HUS)

Hemolytic uremic syndrome is an uncommon condition that can cause life-threatening kidney failure, especially for children and older adults.

Henoch-Schonlein purpura

Henoch-Schonlein purpura causes inflammation of small blood vessels (vasculitis) and often a purplish rash. It's most common in children ages 2 to 6.

High blood pressure in children

Histoplasmosis

HIV/AIDS

Horner syndrome

Hydrocele

Hyperparathyroidism

Hyponatremia

Hypoparathyroidism

Infant jaundice

Infant jaundice, a yellowing of the skin and eyes, is common after birth. Careful monitoring and treatment is important for preventing rare, but serious, complications.

Interstitial cystitis

Frequent urination and pelvic pain may indicate interstitial cystitis, a chronic bladder inflammation. There's no cure, but some treatments offer relief.

Interstitial lung disease

Kidney cancer

Kidney infection

Kidney stones

Listeria infection

Most people exposed to listeria don't become ill. But for those at risk of a listeria infection — a foodborne illness — the consequences can be severe.

Lupus

Lynch syndrome

Membranous nephropathy

Nephrotic syndrome

Non-Hodgkin's lymphoma

Orchitis

Overactive bladder

Pelvic inflammatory disease (PID)

Pheochromocytoma

Postpartum preeclampsia

Prostatitis

Prostatitis, inflammation of the prostate gland, can cause significant male pelvic pain and other symptoms.

Retrograde ejaculation

Retrograde ejaculation occurs when semen enters the bladder instead of emerging through the penis during orgasm. Find out about symptoms and treatment.

Rett syndrome

Reye's syndrome

Rickets

Rickets is a severe and prolonged vitamin D deficiency that leads to softening and weakening of the bones in children.

Scrotal masses

Sjogren's syndrome

Stress incontinence

Sweating and body odor

Excessive sweating and body odor can be embarrassing. Find out the possible causes and what you can do about this personal problem.

Testicular torsion

Toxic shock syndrome

Trichomoniasis

Type 1 diabetes

Urinary incontinence

Urine color

Vasculitis

Vesicoureteral reflux

Wilms' tumor

Feb. 15, 2014