Causes of Hair Loss in Children. There are many reasons kids' hair might fall out abnormally or excessively. The following conditions are the most common causes of hair loss in children: Tinea capitis. The most common cause of hair loss in children is an infection known as tinea capitis.
Bone Marrow and Blood Formation. Bone marrow is the spongy tissue that fills the cavities inside your bones. Most of your blood cells are made in your bone marrow. The process by which blood cells are made is called haemopoiesis.As an infant, haemopoiesis takes place at the centre of all bones. In later life, it is limited to the hips, ribs and breastbone (sternum).he process by which blood cells are made is called haemopoiesis. As an infant, haemopoiesis takes place at the centre of all bones. In later life, it is limited to the hips, ribs and breastbone (sternum).
Formation of a thrombus within a vein is known as a venous thrombosis. If the thrombus breaks loose and travels through the blood system, it is known as an embolus.Venous thrombi: 1  Feature enmeshed erythrocytes. 2  Tend to fragment, creating an embolus. 3  Manifest mainly as DVT and PE.ormation of a thrombus within a vein is known as a venous thrombosis. If the thrombus breaks loose and travels through the blood system, it is known as an embolus. Venous thrombi: 1  Feature enmeshed erythrocytes. 2  Tend to fragment, creating an embolus. 3  Manifest mainly as DVT and PE.