How Often Should You Wash Your Hair? Experts Explain
There is no single number of days that works for everyone. Dermatologists recommend basing your washing routine mainly on your hair type, scalp oiliness, and how quickly your hair becomes dirty or oily. American Academy of Dermatology+1
1. Oily or Straight Hair
If you have straight, fine, or naturally oily hair, you may need to shampoo daily or every other day. Frequent washing can help control excess oil and buildup. American Academy of Dermatology
2. Dry, Curly, or Thick Hair
Dry, curly, coily, or thick hair generally doesn’t need frequent shampooing. The American Academy of Dermatology recommends washing according to need, with some people requiring shampoo only every 2–3 weeks. American Academy of Dermatology+1
3. If You Have Dandruff
If your scalp is flaky or itchy, washing regularly may help. People with an oily or straight scalp may need more frequent shampooing, while those with coarse or curly hair may use an anti-dandruff shampoo less often. American Academy of Dermatology
4. Don’t Shampoo the Entire Length
When washing, concentrate shampoo on your scalp and roots, where oil, dead skin, and product buildup accumulate. This can help prevent the lengths of your hair from becoming unnecessarily dry. American Academy of Dermatology
5. Always Consider Conditioner
Conditioner helps moisturize and detangle hair. For fine or straight hair, concentrate it toward the ends; for dry or curly hair, it can generally be applied through the length of the hair. American Academy of Dermatology
6. What About Dry Shampoo?
Dry shampoo can absorb excess oil and make hair look fresher between washes, but it doesn’t actually clean the scalp. Regular shampoo and water are still needed to remove oil, dead skin, and buildup. American Academy of Dermatology
The Simple Rule
Instead of following a strict “wash every X days” rule, watch your scalp. If it becomes noticeably oily, dirty, itchy, or develops buildup, you may need to wash more frequently. If your hair becomes excessively dry or brittle, you may be washing too often.
If you have persistent itching, heavy dandruff, scalp irritation, or unusual hair loss, consider seeing a dermatologist.
