Hair Loss: Common Causes, Shedding vs. Thinning, and When to See a Dermatologist
Hair loss is not one condition. Genetics, stress, illness, hormones, nutrition, medications, autoimmune disease, and hair-care practices can all play a role.
Shedding and hair loss are not always the same
It is normal to shed some hair each day. After major stress, fever, surgery, childbirth, or significant weight change, some people develop temporary excessive shedding. Progressive thinning, a widening part, a receding hairline, or persistent bald patches can point to a different process.
Common causes
Hereditary pattern hair loss is common. Other causes can include alopecia areata, thyroid disease, hormonal changes, tight hairstyles, some medications, infections, scarring conditions, and deficiencies of certain nutrients.
Why the cause matters more than the product
A shampoo, vitamin, or topical product cannot treat every cause of hair loss. The American Academy of Dermatology emphasizes that effective treatment begins with identifying why the hair is being lost.
Signs that deserve earlier evaluation
Arrange professional evaluation for sudden patchy loss, rapid thinning, scalp pain, redness, scaling, scarring, eyebrow or eyelash loss, hair loss with other unexplained symptoms, or persistent shedding that worries you.
What a dermatologist may ask or examine
A dermatologist may ask when the loss started, whether it was sudden or gradual, what medicines and supplements you take, recent illnesses or stressors, and family history. Examination of the scalp, hair, skin, and nails can provide important clues.
Be careful with “hair growth” supplements
Some nutrient deficiencies can contribute to hair loss, but unnecessary high-dose supplements can create problems of their own. It is better to identify a deficiency than to assume one.
Trusted references
- American Academy of Dermatology — Hair Loss Causes
- American Academy of Dermatology — Hair Loss Diagnosis and Treatment
- American Academy of Dermatology — Hair Shedding vs. Hair Loss
Daily Vitality provides educational information, not medical diagnosis or treatment.