references
  
      American Academy of Dermatology: "Scalp Psoriasis: Symptoms"
    
      Mayo Clinic: "Seborrheic Dermatitis"
    
      Mount Sinai: "Tinea capitis"
    
      U.S. National Library of Medicine: "Yeast Infections"

Is this an emergency? If you are experiencing serious medical symptoms, please see the National Library of Medicine’s list of signs you need emergency medical attention or call 911.

If your scalp or hair smells bad quickly after a shower, you might be over-washing.

Image Credit: Prostock-Studio/iStock/GettyImages

Image Credit: Prostock-Studio/iStock/GettyImages

  • Causes
  • At-Home Remedies
  • Prevention
  • Medical Treatments
  • When to See a Doctor

It’s best to wash your hair between one and four times per week, but the exact number depends on your hair type, the products you use, how often you exercise and your age.

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      American Academy of Dermatology: "Scalp Psoriasis: Symptoms"
    
      Mayo Clinic: "Seborrheic Dermatitis"
    
      Mount Sinai: "Tinea capitis"
    
      U.S. National Library of Medicine: "Yeast Infections"