People typically lose about 100 hairs a day. this usually doesn't cause noticeable thinning of scalp hair because new hair is growing in at the same time. hair loss occurs when this cycle of hair growth and shedding is disrupted or when the hair follicle is destroyed and replaced with scar tissue. hair loss is typically related to one scalp itchy hair loss or more of the following factors: 1. family history (heredity). the most common cause of hair loss is a hereditary condition called male-pattern baldness or fema Also known as ringworm of the scalp, tinea capitis is a fungal infection that penetrates deep into the hair shaft, causing itchiness and hair loss. depending on the type of fungi responsible for. According to mayoclinic. com, an itchy and dry scalp may be due a scalp infection such as ringworm, which invades the hair and scalp skin and contributes to hair loss. infections are usually treated with an oral or topical antifungal medication. once conditions have improved, t...