5. Thyroid Problems and Other Medical Conditions

Thyroid Problems
Related: 15 Thyroid Disease Symptoms You’re Ignoring

Health problems, like thyroid issues, can also be a factor in thinning hair. Both hypothyroidism and hyperthyroidism, as well as PCOS, lupus, certain types of cancer, diabetes, pituitary gland diseases, heavy metal poisoning, HIV and other illnesses can cause thinning hair.

4. Medications


There are several different types of medicines that may contribute to hair thinning, including:

  • Acne medications
  • Antibiotics
  • Antidepressants
  • Antifungal medications
  • Blood thinners (anticoagulants)
  • Chemotherapy
  • Cholesterol-lowering medications
  • Epilepsy medications (anticonvulsants)
  • High blood pressure medications (antihypertensives)
  • Hormone replacement therapy (estrogen or progesterone for women, androgens and testosterone for men)
  • Immunosuppressant medications
  • Interferons
  • Mood stabilizers
  • Nonsteroidal anti-inflammatory medications (NSAIDs)
  • Oral contraceptives
  • Parkinson’s disease medications
  • Steroids
  • Thyroid medications

3. Trigger Event

Emotional Trigger

If a person undergoes an intense shock, whether physical or emotional, it can result in temporary hair thinning that may last for some months afterward. For example, a death in the family, major surgery, and sudden or excessive weight loss are events that can trigger a shock to the body.

2. Poor Hair Management

Hair Management

Excessive use of hair styling products or overheating the hair when styling can also contribute to thinning hair. Coloring, straightening, and extensions can make the hair dry and brittle. Constant styling can cause entire sections of the hair to break off. Pulling the hair back too tightly can also contribute to thinning.

1. Other Risk Factors

Hair Loss
Related: Top 10 Natural Treatments for Thinning Hair

There are several other risk factors that can cause hair loss and thinning hair, including age, stress, inadequate nutrition, and chronic diseases. These can occur on their own or in conjunction with one of the factors listed above.



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