Body odor is something everyone experiences, but the way it smells can change throughout life. For some women, a noticeable difference may appear during middle age or later adulthood, even when their personal hygiene routine has remained essentially the same.

That can be surprising—and sometimes embarrassing.

A person may shower regularly, wear clean clothes, and use deodorant, yet still notice that their natural scent seems different than it used to be.

The good news is that changes in body odor are not automatically a sign of poor hygiene. Aging can affect the skin, sweat glands, hormones, medications, diet, and the communities of microorganisms living on the skin. Everyday habits can influence these changes as well.

One compound often discussed in connection with age-related body odor is 2-nonenal, an odor-producing compound associated with the oxidation of certain fatty acids on the skin. Research suggests that changes in skin composition with age may contribute to its formation. However, body odor is complex, and there is no single “aging smell” that applies to every person.

Here are five everyday habits that may contribute to noticeable odor changes—and what you can do about them.

1. Washing the Skin Too Little or Too Aggressively

It may sound contradictory, but both insufficient cleansing and excessive cleansing can create problems.

Sweat itself is not necessarily what produces strong body odor. Much of the odor develops when microorganisms on the skin break down substances found in sweat and other skin secretions.

As people age, skin often becomes thinner and drier. Hormonal changes can also affect oil production and the skin barrier.

Using very hot water, scrubbing aggressively, or applying harsh soaps repeatedly can remove too much of the skin's natural protective oils.

This may leave the skin:

• Dry

• Irritated

• Tight

• Flaky

• More sensitive

On the other hand, inadequate washing—especially in areas where sweat and moisture accumulate—can allow sweat, oils, dead skin cells, and microorganisms to build up.

A gentler approach

For most people, the goal is not to scrub the body until it feels completely “squeaky clean.”

Instead, use lukewarm water and a gentle cleanser, paying particular attention to areas where moisture tends to collect, such as the underarms, groin, feet, and skin folds.

After bathing, dry the skin thoroughly.

This is particularly important beneath breasts and in other skin folds, where persistent moisture can encourage irritation and microbial overgrowth.

2. Wearing the Same Clothes for Too Long

Even when your body is clean, clothing can retain odor.

Sweat, skin oils, bacteria, and environmental smells can accumulate in fabrics, especially around the underarms, collar, and areas that come into close contact with the skin.

Synthetic fabrics can sometimes hold onto certain odors more readily than some natural fibers.

This means a shirt may smell fine when you first put it on but develop an unpleasant odor after several hours of wear.

The same problem can occur with:

• Bras

• Sleepwear

• Socks

• Exercise clothing

• Jackets worn repeatedly

• Towels

• Shoes

Don't forget the laundry itself

If clothes are washed but still smell slightly musty afterward, the issue may be the washing process rather than your body.

Overloading a washing machine, using too much detergent, leaving damp laundry sitting in the machine, or allowing clothes to dry slowly can contribute to persistent odors.

Wash clothing according to its care instructions and make sure it dries thoroughly.

For items that sit directly against the skin, regular washing is particularly important.

3. Not Drinking Enough Fluids

Hydration does not directly “wash body odor out of the body,” but inadequate fluid intake can influence several things that may affect how a person feels and smells.

When someone becomes dehydrated, urine generally becomes more concentrated and may develop a stronger odor.

Dry mouth can also become more noticeable, and older adults may be particularly vulnerable to dehydration because thirst perception can change with age.

Certain medications, medical conditions, hot weather, and reduced fluid intake can all contribute.

However, drinking excessive amounts of water is not necessary and can be dangerous in some circumstances.

A practical approach

Rather than forcing yourself to drink a particular amount regardless of your circumstances, pay attention to your body's needs and follow medical advice if you have been told to restrict fluids because of a heart, kidney, or other condition.

Water is usually the simplest choice, while foods with high water content can also contribute to overall fluid intake.

If you notice a sudden or unusually strong change in urine odor, particularly with pain, burning, fever, or frequent urination, don't assume dehydration is the only explanation. A urinary tract infection or another medical problem may need evaluation.

4. Eating Certain Foods Frequently

Diet can influence body odor because compounds from foods can be metabolized and eventually released through breath, sweat, urine, or other bodily secretions.

Some foods are particularly noticeable.

Garlic and onions, for example, contain sulfur compounds that can contribute to strong odors.

Spicy foods may also cause some people to sweat more, particularly when eaten in hot environments.

Other dietary factors can influence odor indirectly. Alcohol consumption, for instance, can affect sweating and breath odor and can contribute to dehydration.

This does not mean that older women need to avoid garlic, onions, spices, or other flavorful foods.

These foods can be part of a healthy diet.

Instead, if you notice that your body odor consistently changes after eating particular foods, consider keeping a simple food-and-symptom diary for a few days.

That can help identify personal patterns without unnecessarily restricting your diet.

5. Neglecting Areas That Become More Difficult to Reach

As people get older, ordinary tasks can sometimes become physically more difficult.

Reduced flexibility, arthritis, limited mobility, or other physical changes may make it harder to wash or dry certain areas thoroughly.

Someone may continue following the same bathing routine but unintentionally miss areas such as:

• Between skin folds

• The upper back

• Feet

• Behind the ears

• Under the breasts

• The groin

• Between the toes

This isn't a matter of being “unclean.”

It is often simply a practical issue.

Moisture and warmth can create an environment where microorganisms thrive, particularly in skin folds.

If reaching certain areas has become difficult, a long-handled bathing tool, shower chair, handheld showerhead, or assistance from a trusted caregiver may make personal hygiene easier and safer.

Hormonal Changes Can Also Affect Body Odor

Everyday habits are only part of the story.

Hormonal changes can have a substantial effect on sweating and skin chemistry.

During perimenopause and menopause, estrogen levels change. Some women experience hot flashes and night sweats, while others notice changes in their skin.

Sweat itself isn't necessarily the problem.

The interaction between sweat, skin oils, microorganisms, clothing, and environmental conditions can change the overall odor.

This is one reason someone may suddenly notice a different body scent even though her hygiene routine hasn't changed.

The change is biological—not evidence that she is doing something wrong.

Medications Can Change the Way You Smell

Another commonly overlooked factor is medication.

A wide range of medicines can influence sweating, saliva production, urine concentration, digestion, or metabolism.

Some medications may cause increased sweating, while others can contribute to dry mouth.

If you've recently started a medication and notice a significant change in body odor, don't stop taking it on your own.

Instead, ask your doctor or pharmacist whether the medication could plausibly be contributing.

The same applies to supplements and herbal products.

“Natural” products can also alter metabolism or interact with medications.

When Body Odor Could Signal a Medical Problem

Most changes in body odor are harmless.

But a new, persistent, or unusually strong odor can occasionally accompany an underlying health problem.

The odor itself cannot diagnose a disease, but changes that occur together with other symptoms deserve attention.

For example, a person with excessive sweating, unexplained weight loss, fever, persistent fatigue, changes in urination, skin infections, or other new symptoms should discuss them with a healthcare professional.

Certain metabolic disorders can produce distinctive odors, although these are relatively uncommon.

A fruity or acetone-like breath odor, particularly in someone with diabetes who also has excessive thirst, frequent urination, nausea, vomiting, abdominal pain, or unusual drowsiness, can be a medical emergency because it may indicate diabetic ketoacidosis.

A strong ammonia-like odor can have multiple explanations, including dehydration or changes in urine, but persistent unusual odors accompanied by illness should be evaluated rather than self-diagnosed.

Don't Automatically Blame Aging

One of the most important points is this:

Getting older does not mean you are destined to have unpleasant body odor.

Aging can change skin chemistry and physiology, but a dramatic or sudden odor change should not simply be dismissed as “old age.”

New odor may result from something completely manageable.

It could be:

• A new medication

• A skin infection

• Increased sweating

• Changes in diet

• Dental problems

• A urinary infection

• Hormonal changes

• Poorly ventilated clothing

• A change in bathing habits

• Difficulty reaching certain areas

• Another medical condition

The context matters.

A Simple Routine for Managing Body Odor

If you're noticing a change, you don't need to completely overhaul your lifestyle.

Start with the basics.

Keep skin clean and dry

Use gentle products and focus on areas where sweat accumulates.

Change clothes regularly

Pay particular attention to underwear, socks, bras, sleepwear, and exercise clothing.

Wash towels and bedding

These items can retain sweat, oils, and microorganisms.

Keep skin folds dry

Moisture management can be particularly important beneath breasts, in the groin, and between toes.

Wear breathable clothing

Choose fabrics that are comfortable and allow moisture to evaporate when appropriate.

Maintain oral hygiene

Sometimes what appears to be a “body odor” problem is actually coming from the mouth.

Brush twice daily with fluoride toothpaste, clean between the teeth, and maintain regular dental care.

Stay appropriately hydrated

Unless you've been instructed to restrict fluids, maintain regular fluid intake according to your needs.

Review medications

If the change began after starting a new medicine or supplement, discuss it with a healthcare professional.

Don't Use Strong Fragrances to Simply Cover the Problem

Perfume, body spray, and heavily scented lotions may temporarily mask an odor.

But they don't necessarily address its source.

In some cases, layering strong fragrance over sweat can create an even more noticeable combination.

If odor persists despite good hygiene, it is better to investigate the underlying cause than continuously add more fragrance.

This is especially important if there are accompanying symptoms such as redness, itching, pain, discharge, sores, or sudden changes in sweating.

When Should You See a Doctor?

Consider speaking with a healthcare professional if:

• Body odor changes suddenly without an obvious reason

• The odor persists despite normal hygiene

• You develop a new or unusual smell along with other symptoms

• There is persistent sweating or night sweating

• You notice unexplained weight loss

• There are recurring skin infections

• You have unusual changes in urination

• You develop persistent itching or jaundice

• A new medication seems to coincide with the change

A clinician can review your medical history, medications, diet, skin condition, and other symptoms and decide whether testing is necessary.

The Bottom Line

Body odor can change as we age, and that change is not necessarily a reflection of hygiene.

Changes in skin chemistry, hormones, sweating, medications, diet, clothing, and the skin's microbial environment can all play a role.

Five everyday habits deserve particular attention:

Washing the skin too little or too aggressively, wearing clothing for too long, not maintaining appropriate hydration, regularly consuming foods that noticeably affect personal odor, and unintentionally missing difficult-to-reach areas.

But these aren't the only possible explanations.

If you notice a gradual change without other symptoms, simple adjustments to cleansing, clothing, moisture control, and diet may help.

If the change is sudden, persistent, unusually strong, or accompanied by other physical symptoms, don't simply assume that it's part of aging.

Your body naturally changes over time but a new odor can sometimes be useful information. Paying attention to the pattern, rather than feeling embarrassed by it, is often the most helpful first step.