Alopecia Areata

• "Alopecia areata" is a temporary loss of your hair caused by stress that may result in patchy baldness and can spread over your entire scalp.
  
  

Telogen Effluvium

• "Telogen effluvium" is a type of hair loss that may be patchy or widespread and is caused by changes in the growth cycle of your hair.
  
  

Ringworm

• Ringworm is a fungal infection that may cause areas of patchy baldness and dry, scaly skin on your scalp.
  
  

Cicatricial Alopecia

• "Cicatricial alopecia" is caused by inflammation and scarring that damages your hair follicles and prevents hair from growing, which may result in patchy baldness.
  
  

Traction Alopecia

• "Traction alopecia" is caused by pulling your hair while brushing or in tight hairstyles such as a ponytail or bun, and can cause patchy baldness.
  
  

Trichotillomania

• "Trichotillomania" is the medical term for obsessive hair pulling, which may cause patchy baldness of the scalp, eyebrows and body hair.
  
  

Chemotherapy

• Chemotherapy drugs used to treat cancer may cause patchy baldness that resolves after you have completed treatment.