Unfortunately, a cast can start to stink, and often the smell can become quite bad.
Once a cast starts to smell bad, it is unlikely that it will start to smell good.
Cast odor tends to be most problematic in young children and athletes.

Michael Krinke / istock
Little kids have a hard time keeping the cast dry.
Athletes may not give up their exercise, causing sweat to accumulate under the cast.
So, what can you do if you have a smelly cast?
Keep It Dry
The key to an odor-free cast is moisture.
If you cankeep your cast dry, you’ll likely not have odor problems.
This means keeping water out of the castandkeeping sweat from being produced under the cast.
More heavy-duty plastic, like using plastic bags with medical or duct tape, is generally a better option.
The quicker you’re free to get to the problem, the better!
Recap
Keep your cast dry by preventing water and sweat from getting in it.
Cover it with plastic to keep water out and avoid strenuous exercise and sports if possible.
Get a New Cast
If the odor becomes a problem, call your healthcare provider.
Let them know that you think you should have the cast looked at.
Sometimes a cast cannot be removed because it is holding the bone in an important position.
However, often a cast can be replaced.
There are conditions where a cast should be removed.
If that’s the case, see your healthcare provider about possibly getting a new cast.
You may also consider a waterproof cast.
There is a cost sometimes associated with the materials for awaterproof cast.
However, it may be worthwhile to help you keep it from smelling too bad.
Keeping your cast dry is one of the most important ways to prevent odor.
Keep your cast out of water, unless you’ve specifically been told it’s waterproof.
Avoid strenuous exercise and sports to prevent sweating under the cast.
Products to prevent cast smells are also available for purchase.
If the smell is particularly bothersome, you may need to check with your doctor.
They can replace your cast if needed and evaluate your skin for any signs of infection.
A Word From Verywell
Treatment of a broken bone with a cast is rarely a pleasant experience.
Even for young children who may beexcited to get a cast, the fun wears off quickly.
One of the most problematic aspects of caring for a cast is keeping things from getting too pungent.
There are steps you’ve got the option to take to control the odor coming from a cast.
American Academy of Family Physicians.Cast Care.
American Academy of Orthopaedic Surgeons.Care of Casts and Splints.
National Health Service University Hospitals Sussex.Taking care of your plaster cast.