What Causes Hair Thinning?

Inherited pattern hair loss often develops gradually. The part may widen, the temples may recede, or the crown may become more visible; the pattern differs between male and female pattern hair loss. Telogen effluvium can cause noticeably increased shedding after fever, major illness, surgery, emotional stress, rapid weight change, or childbirth. It may appear after the trigger rather than immediately.

Low intake or poor absorption of nutrients can contribute to nutritional hair loss. Thyroid or other hormonal conditions may also alter the growth cycle. Tight hairstyles, frequent chemical processing, heat, and repeated traction can break hairs, making density look reduced even when the follicles are intact. Hair thinning is a symptom with several possible causes, so its presence does not by itself establish a diagnosis.

Track when shedding or reduced density began, whether it is diffuse or in patches, and what happened in the months beforehand. Use gentle handling, avoid tight pulling, and review restrictive diets, new medicines, illness, and menstrual or hormonal changes with a clinician. Examination may include a scalp review and targeted blood tests when the history suggests a nutritional or hormonal contributor.

Treatment follows the cause. Options may include correcting a confirmed deficiency, treating scalp disease, reducing traction, or using a recommended hair-loss treatment such as topical minoxidil. A clinician can explain expected timelines and whether a procedure such as PRP for hair loss fits your diagnosis.

Arrange medical assessment for sudden or rapidly progressing thinning, smooth bald patches, scalp pain, marked itch, scaling, redness, sores, or eyebrow loss. Seek prompt care if hair loss occurs with unexplained weight change, severe fatigue, muscle weakness, or other new body symptoms. Early assessment can help identify inflammation, infection, nutritional problems, or medication effects before more hair is affected.

Ask whether the pattern suggests male pattern hair loss, female pattern hair loss, telogen effluvium, nutritional hair loss, or another condition. Ask which tests are useful, whether a medicine or illness could be contributing, how to protect fragile hair, and when improvement should be reviewed.