If you are male, hereditary or  Male patterned baldness or androgenetic alopecia is the most common cause of hair loss, where there will be associated thinning of hair.

Other causes include:

• Stress
• Sudden weight loss
• Crash dieting
• Vitamin D deficiency
• Vitamin B12 deficiency
• Following high grade fever
• Surgeries or accidents

If you are female, the most common causes of hair loss are:

• Following pregnancy or peri menopause
• Iron deficiency (anaemia)
• Thyroid hormone dysfunction

In addition, factors causing hair loss in males may also cause hair loss in females – these include:

• Stress
• Sudden weight loss
• Crash dieting
• Vitamin D deficiency
• Vitamin B12 deficiency
• Following high-grade fever
• Surgeries or accidents