According to my research I have found 3 different types of hair loss in children. Hair loss in children can be traumatic and embarrassing for both children and their parents.
1. Alopecia Areata: Wikapedia defines Alopecia Areata is a condition affecting humans, in which hair is lost from some or all areas of the body, usually from the scalp. Because it causes bald spots on the scaalp, especially in the first stages it is sometimes called spot baldness. There is some good news though. At least 60% of children with Alopecia will "outgrow" the condition without need for treatment.
As with all forms of Alopecia, a reversal and complete restoration of hair takes time - sometimes up to a year or more, but for the vast majority of children, it will spontaneously resolve. The bad news is that 40% won't have such luck. This can be quite frustrating for the parents and child effected by this often cosmetically embarrassing condition.
2. Telogen Effluvium: This condition is believed to be caused by fungal infection of the scalp, eyebrows, and eyelashes. It is also called ring worm of the scalp. This fungus invades the hair shaft and causes the hairs to break. The area infected is often round and takes on the appearance of black dotted surface due to the stubble. There may be itching and scaling in the area also. This condition can be passed ob by contact from one infected child to another through the sharing of brushes, hats, combs barrettes, bath towels, and pillows. Children aged 3 to 10 years of age are more susceptible and boys are more susceptible than girls. This condition is not dangerous but without treatment hair loss can be considerable.
3. Traction Alopecia: According to Traction-Alopecia website, this is a hair loss condition caused by damage to the hair follicle by constant pulling or tension over a long period. It often occurs in persons who wears tight braids, especially "cornrows" that lead to high tension, pulling and breakage of hair.
Human hair is fragile and does not respond well to the assault of physical and chemical procedures it has to face in the name of beauty. Teasing the hair to fluff it, combing to harshly, curling, blow drying with the setting too hot, hot irons, straightening and bleaching are just a few of these procedures that will damage the hair and make it break or fall out especially around the hair line and around the front and sides.
This is not as frequent in adults as it is children. In adults the hair has had time to strengthen over several years.
Styles that apply tension such as pony tails, braiding, and barrettes. But if hair loss is noted in your child do not assume that the hair has fallen out due to a pony tail being too tight. Always seek a physician.
As with all forms of Alopecia, it may take regrowth period of a year or more. The good news is 60% of children with hair loss, regain their hair and recover spontaneously.