Skip to main content

Check Your Symptoms
Find A Doctor
Find A Dentist
Connect to Care
Find Lowest Drug Prices

Health
A-Z
Health A-Z
Common Conditions
ADD/ADHD
Allergies
Arthritis
Cancer
Coronavirus (COVID-19)
Depression
Diabetes
Eye Health
Heart Disease
Lung Disease
Orthopedics
Pain Management
Sexual Conditions
Skin Problems
Sleep Disorders
View All
Resources
Symptom Checker
WebMD Blogs
Podcasts
Newsletters
Questions & Answers
Insurance Guide
Find a Doctor
Children's Conditions A-Z
Surgeries and Procedures A-Z
- Symptom Checker COVID-19: Check Your Symptoms Now
- Slideshow Get Help for Migraine Relief
Drugs &
Supplements
Drugs & Supplements
Find & Review
Drugs
Supplements
Drug Basics & Safety
Commonly Abused Drugs
Taking Meds When Pregnant
Tools
Manage Your Medications
Pill Identifier
Check for Interactions
Drug Comparison Tool
- Slideshow Vitamins You Need as You Age
- Slideshow Supplements for Better Digestion
Living
Healthy
Living Healthy
Diet, Food & Fitness
Diet & Weight Management
Weight Loss & Obesity
Food & Recipes
Fitness & Exercise
Beauty & Balance
Healthy Beauty
Health & Balance
Sex & Relationships
Oral Care
Living Well
Women's Health
Men's Health
Aging Well
Healthy Sleep
Healthy Teens
- Article Smart Grocery Shopping When You Have Diabetes
- Quiz Do You Know the Benefits of Walking?
Family &
Pregnancy
Family & Pregnancy
All About Pregnancy
Getting Pregnant
First Trimester
Second Trimester
Third Trimester
View All
Parenting Guide
Newborn & Baby
Children's Health
Children's Vaccines
Raising Fit Kids
View All
Pet Care Essentials
Healthy Cats
Healthy Dogs
View All
- Slideshow Smart Snacks When You're Pregnant
- Slideshow Surprising Things You Didn't Know About Dogs and Cats
News &
Experts
News & Experts
Health News
Coronavirus News & Updates
COVID-19 Vaccines -- Latest Updates Here
COVID-19: Check Your Symptoms Now
Coronavirus in Context: Interviews With Experts
Social Distancing, Quarantine Explained
Experts & Community
WebMD Blogs
News Center
- WebMD News Get the Latest COVID-19 News Here
- Newsletters Sign Up to Receive Our Free Coroanvirus Newsletter

Sign In

Share on Facebook

Share on Twitter

Share on Pinterest

Top 12 Topics

Coronavirus (COVID-19)
CBD Oil
Keto Diet
Hepatitis C
Diabetes Warning Signs
Rheumatoid Arthritis
Morning-After Pill
Breast Cancer Screening
Psoriatic Arthritis Symptoms
Heart Failure
Multiple Myeloma
Types of Crohn's Disease

Medical Dictionary

Anhidrosis

Share on Facebook

Share on Twitter

Share on Pinterest

Not being able to sweat.

WebMD Definition

© 2017 WebMD, LLC. All rights reserved.

Today on WebMD

Risky Mistakes Pet Owners Make

Some of these might surprise you.

Depressed, Guilty Feelings After Eating?

Symptoms of binge eating disorder.

Psoriasis Home Remedies

14 tips to ditch the itch.

Quit Smoking

Get your personalized plan.

Health Solutions

Penis Curved When Erect
Could I have CAD?
Treat Bent Fingers
Discover hATTR Symptoms
Discover Immunotherapy
Relapsing MS Options
Rethink MS Treatment
AFib-Related Strokes
Risk of a Future DVT/PE
Is My Penis Normal?
Weight-Loss Surgery
Liver Transplants Save Lives
Finance Plastic Surgery
Bent Finger Causes
Trouble Urinating?
Missing Teeth?

More from WebMD

Finding the Care You Need for MS
How to Thrive With Narcolepsy
Relief for Blocked Hair Follicles
Psoriatic Arthritis and Your Sleep
What Psoriasis Feels Like
First Psoriatic Arthritis Flare
Talking to Your Doctor About RA
Common Psoriasis Triggers
Avoiding Crohn’s Flares
Living With Ankylosing Spondylitis
When RA Symptoms Get Worse
Types of B-Cell Therapy for MS
Living Better With T2 Diabetes
Why Prostate Cancer Spreads
When Ulcerative Colitis Flares
Where Breast Cancer Spreads

- Find us on:
- Facebook
- Twitter
- Pinterest
Policies
About
WebMD Network
Our Apps
For Advertisers
- Advertise with Us
- Advertising Policy

© 2005 - 2021 WebMD LLC. All rights reserved.

WebMD does not provide medical advice, diagnosis or treatment.

See additional information.