It could be psoriasis, another sign of it is little dimples in one fingernails.
Your scalp has spots due to sensitive skin, try using a different shampoo =)
A fungus can cause small round hairless patches on the scalp. If you are losing hair in patches, you should see a physician, who can prescribe cream to stop the fungus.
It could be stress; it could also be a nutritional deficency, a scalp condition, and other things. Make sure she's getting the right nutrients; a multivitamin would be a good start. Talk to a dermatologist about it.
Tinea or ringworm is caused by dermatophytes or fungi. It is a skin fungus infection that can affect different areas of the body like the scalp, hands, nails, and feet. Symptoms of tinea can include scaly, round patches of skin and itching.
Another surgical procedure used to treat androgenic alopecia is scalp reduction. By stretching skin, the hairless scalp can be removed and the area of bald skin decreased by closing the space with hair-covered scalp.
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Scalp psoriasis can be identified by red, itchy, scaly skin. The flaking of the skin can range between light white flaky patches, similar to dandruff, and brown think scaly patches. For more information about Scalp Psoriasis, view http://www.medicinenet.com/psoriasis/article.htm.
The scalp could be red from rosacea or an allergy to shampoo.
Poor hygiene?
When your hair is relaxed and overprocessed.
Nits? Is that an answer or a question. There could be a hundred causes but the most common causes are oily scalp, not clean, dry scalp, dandruff. The list goes on and on. If you can;t seem to get it under control, you should see a dermatologist.
your scalp (the skin on the top of your head)
Children should not have bald spots, unless you had a head injury that damaged the scalp. If you are concerned about a hairless area, talk to your doctor.
Could be an insect bite.