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Published on: 8/20/2026

What is the term for the partial or complete loss of hair that occurs most commonly on the scalp?

Alopecia is the medical term for partial or complete hair loss, most commonly affecting the scalp. It can occur suddenly or gradually, appear in patches or diffusely, and may be temporary or permanent depending on the underlying cause. Common types include androgenetic alopecia (pattern baldness), alopecia areata (patchy, autoimmune-related loss), and telogen effluvium (stress- or illness-related shedding).

Because hair loss can stem from many different causes—hormones, genetics, autoimmune conditions, nutritional deficiencies, medications, or stress—identifying the specific type of alopecia is essential to finding the right treatment. Rather than guessing, take a free, instant, online symptom check to help clarify possible causes and guide your next steps with confidence.

Reviewed for medical accuracy: 07/15/2026

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Explanation

Alopecia is the medical term used to describe hair loss, which can occur partially or completely, and is most commonly seen on the scalp. There are different types of alopecia, each with unique characteristics and causes.

Types of Alopecia:

  • Androgenetic Alopecia: This is the most common form, often referred to as male or female pattern baldness.
  • Alopecia Areata: An autoimmune condition that causes patchy hair loss.
  • Frontal Fibrosing Alopecia: A type of hair loss that affects the front part of the scalp, often seen in postmenopausal women.

Causes:

  • Genetic Factors: Family history can play a significant role in hair loss.
  • Autoimmune Disorders: The body's immune system mistakenly attacks hair follicles.
  • Hormonal Changes: Such as those occurring during menopause or pregnancy.

Understanding the type and cause of alopecia is important for determining the appropriate treatment approach. For example, cosmetic treatments may help in some cases, while others might require medical intervention. If you're experiencing unusual hair loss or other concerning symptoms, you can use Ubie's free AI symptom checker to help identify potential causes and determine whether you should consult a healthcare provider for an accurate diagnosis and treatment plan.

(References)

  • Sinclair R, Patel M, Dawson TL Jr, Yazdabadi A, Yip L, Perez A, & Rufaut NW. (2011). Hair loss in women: medical and cosmetic approaches to .... The British journal of dermatology, 22171680.

  • Emre S, Metin A, Caykoylu A, Akoglu G, Ceylan GG, Oztekin A, & Col ES. (2016). Clinical characteristics and HLA alleles of a family with .... Cutis, 27416096.

  • Morandi Stumpf MA, do Rocio Valenga Baroni E, & Schafranski MD. (2020). Frontal Fibrosing Alopecia: Successfully Treated with .... Acta dermatovenerologica Croatica : ADC, 33422174.

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