We’ve all done it: You plug your aches and pains into WebMD’s Symptom Checker, see that it could be either “cancer” or “seasonal allergies,” and promptly close out the window and decide to ignore ...

Correction: The original version of this article misstated the symptom checker's original launch date. WebMD, long the go-to for patients turning to the internet for an answer to mysterious symptoms, ...

Nutcracker syndrome is a rare condition that happens when the vein that drains your left kidney gets squeezed between big blood vessels in your belly. It can be very painful, but it's usually not ...

Complement 3 glomerulopathy (C3G) is a rare kidney disease caused by problems in the body's complement system, which normally helps fight infections. It damages tiny filters in your kidneys called ...

Immune complex-mediated membranoproliferative glomerulonephritis (IC-MPGN) is a rare disease that affects the filtering units in your kidneys (glomeruli). There are many types of glomerular diseases.