Oral terbinafine is effective in the treatment of relatively resistant superficial dermatophyte infections including tinea unguium (onychomycosis), tinea pedis and tinea corporis or tinea cruris, achieving mycological cure in over 80% of adult patients  . It is effective for children with tinea capitis at a dose of mg/day to 250 mg/day for four weeks  -  . Topical terbinafine 1% formulations have been effective when applied once or twice daily for two weeks. Gupta et al  concluded that terbinafine may be the drug of choice for superficial fungal infections in children. Terbinafine is available in Canada as a topical 1% cream and orally as a 250 mg tablet. No liquid formulation is available.
Trichotillomania is a psychiatric impulse-control disorder. 17 The mean age of onset is eight years in boys and 12 years in girls, and it is the most common cause of childhood alopecia. 1 , 15 Although any part of the body can be involved, the scalp is the most common. Patients also may eat the plucked hairs (trichophagy), causing internal complications such as bowel obstruction. 18 The hair loss often follows a bizarre pattern with incomplete areas of clearing ( Figure 9 ) . The scalp may appear normal or have areas of erythema and pustule formation. A scalp biopsy may be necessary to rule out other etiologies, because patients may not acknowledge the habit.
Different fungi, depending on their location on the body, cause ringworm. It is caused by a fungal infection—not an actual worm. Fungi on the skin, hair, and nail bed are called dermatophytes. Also referred to by healthcare providers as Tinea infections, infection on the scalp, arms, legs, face, and trunk is characterized by ring-shaped, red, scaly patches with clearing centers. Tinea infections of the feet, nails, and genital areas are not generally referred to as ringworm, as they may not take on the typical ring shape. There is an increased risk of contracting ringworm and other tinea infections if a person: