Can heat from blow dryers damage hair follicles in any way or cause hair loss or it just affects the shaft?

Thanks for your query. Heat from the blow dryers does not affect the follicles much. Yes excess heat can damage the hair shaft and make your hair brittle and dry which cause hair fall. Use of hair dryer should be limited and should not be used in excess as this cause hair fall. Hope it helps.All The Best

Damage caused by high heat hair drying and other damaging hair care practices primarily affects the hair shaft. While it may cause brittleness and split ends, which can make it appear as though the hair is thinning, it is unlikely to permanently harm the hair follicles that lie safely underneath the skin’s surface.

You should keep in mind, however, that serious and prolonged trauma to the scalp, either as a result of severe burns that damage the epidermis or the extreme tension that results from certain hairstyles can place enough strain on the follicles to have an effect on hair growth. In extreme cases, patients can experience traction alopecia or even permanent scarring alopecia when the scalp has suffered significant damage.



I often recommend that those concerned with hair loss dry their hair using low heat, since preventing breakage and split ends has the effect of making hair appear thicker and fuller. However, for heat to cause permanent damage to the follicles that are deep underneath the skin, serious burning to the scalp surface would have had to have occurred.

Your follicles are typically 1centigrade cooler than your core temperature.  They do not like heat exposure over a long time, whether it comes in the form of sun exposure, hot ironing, or hot blow drying. If you need to use a blow dryer, use it on a cool setting. 

The heat from blow dryers may damage to the shaft of hair and may cause dull , brittle , breakable hair. but it does not affect the root and cause a permanent damage or hair loss.

extreme or excess heat from blow dryer can cause damage to the hair shaft, and can cause temporary hair loss. however the hair follicle should stay intact and start to regrow a few months later.

Excessive heat can damage the hair that is above the scalp from a blow dryer but I doubt it would do permanent damage below the scalp where new hair forms