When your nose smells like sewage it's likely because of bacteria or fungus in the nose.
Or you may have a sinus infection coming on or other condition.
You should first try cleaning the inside of your nose with some hydrogen peroxide and a cotton swab to see if it gets rid of the sewage smell in your nose.
If that works then it's likely just bacteria or fungus growing in your nose.
If the sewage smell continues then you should see a doctor about it as it could be another infection.
You can get rid of the rotten smell in your nose by using a cotton swab with some hydrogen peroxide which helps to clean and disinfect the inside of your nose.
Also if it's a sinus infection or other condition then the condition will need to be treated to get rid of the rotten smell in your nose.
You can also get rid of a rotten smell in your nose by eating fiber-rich foods.
And avoiding foods and drinks that cause dehydration, such as caffeine and alcohol. using antihistamines or decongestants to treat nasal or sinus inflammation and avoiding foods and drinks that cause bad smells in the mouth, such as garlic and onions.
A rotten smell in your nose can be caused by bacteria, germs, dirt, sinus infection, nasal polyps or other conditions.
Most often the rotten smell in your nose is simply because you need to clean your nose out.
You can clean your nose out by using a cotton swab with some hydrogen peroxide which helps to clean and disinfect the inside of your nose.
Also wash the outside of your nose as sometimes the bacteria and dirt can be on the outside of your nose which causes you to smell the rotten smell.
Cleaning your nose regularly can also help to keep the rotten smell in your nose away.
If the rotten smell in your nose continues you should see a doctor to rule out any other infections.
But most cases of a rotten nose smell are not serious and go away eventually.