Here's How Often You Should Wash Your Hair, According to a Dermatologist


 

Frequency: Every day or every other day

If your hair looks greasy by the end of day one, you likely need more frequent washing. Oily scalps produce excess sebum that can weigh hair down, attract dirt, and even contribute to acne along the hairline.

Tips:

  • Use a gentle, sulfate-free shampoo designed for oily hair

  • Focus shampoo on the scalp, not the ends

  • Avoid heavy conditioners near the roots

2. Dry or Damaged Hair

Frequency: 2-3 times per week

If your hair is color-treated, heat-styled frequently, or naturally dry, washing less often helps preserve moisture and prevent breakage.

Tips:

  • Use moisturizing, sulfate-free shampoos

  • Deep condition regularly

  • Let your hair's natural oils help condition the ends

  • Consider co-washing (conditioner-only washing) between shampoos

3. Normal Hair

Frequency: 3-4 times per week

If your scalp isn't too oily or too dry, you have flexibility. Listen to your hair—wash when it feels or looks like it needs it.

Tips:

  • Alternate between regular and clarifying shampoos

  • Pay attention to how your hair responds to weather, exercise, and product use

4. Curly or Coily Hair

Frequency: 1-2 times per week (or even less)

Curly and coily hair types are naturally drier because oils struggle to travel down curly shafts. Less frequent washing preserves moisture.

Tips:

  • Use sulfate-free, moisturizing shampoos

  • Co-wash between shampoos

  • Deep condition with every wash

  • Protect hair with satin bonnets or pillowcases

5. Fine or Thin Hair

Frequency: Every other day to daily

Fine hair shows oil more quickly and can look limp without frequent washing.

Tips:

  • Use volumizing shampoos

  • Focus on the scalp

  • Avoid heavy conditioners and oils near the roots


Other Factors to Consider

Exercise and Sweat

If you work out regularly and sweat heavily, you may need to wash more often—even if your hair type typically requires less. Sweat can irritate the scalp and lead to buildup.

Product Use

If you use heavy styling products (gels, pomades, sprays), you may need to wash more frequently to prevent buildup.

Environmental Factors

Humidity, pollution, and hard water can all affect how quickly your hair gets dirty.

Age

Hormonal changes affect oil production. Teenagers and young adults often have oilier scalps, while older adults may produce less oil.


How to Wash Hair Properly

Step 1: Wet Thoroughly

Completely saturate hair with warm (not hot) water. Hot water strips natural oils.

Step 2: Shampoo the Scalp

Focus shampoo on your scalp, not the ends. Use your fingertips (not nails) to massage gently for 1-2 minutes.

Step 3: Rinse Thoroughly

Rinse until water runs clear. Leftover shampoo can cause buildup and irritation.

Step 4: Condition the Ends

Apply conditioner from mid-length to ends. Avoid the scalp unless your scalp is very dry.

Step 5: Cool Rinse (Optional)

A quick cool-water rinse can help seal the cuticle and add shine.


What About Dry Shampoo?

Dry shampoo is a great tool for extending time between washes—but it's not a replacement for actual washing. It absorbs oil at the surface but doesn't clean the scalp. Overusing dry shampoo without proper washing can lead to buildup, clogged follicles, and even scalp irritation.

Use dry shampoo: Between washes, but still wash regularly to keep your scalp healthy.


The Bottom Line

There's no universal answer to how often you should wash your hair. The right frequency depends on:

  • Your hair type and texture

  • Your scalp's oil production

  • Your lifestyle (exercise, styling habits)

  • Your environment

Listen to your hair. If it looks greasy, feels heavy, or your scalp itches, it's time to wash. If it feels dry or brittle, you may be washing too often.

When in doubt, ask a professional. A dermatologist or trusted stylist can help you find the perfect routine for your unique hair.