This choice depends on the level of hearing loss, type of hearing loss, and personal preference. Hearing aid applications are one of the options for hearing loss management. For people with bilateral hearing loss, it is not clear if bilateral hearing aids (hearing aids in both ears) are better than a unilateral hearing aid (hearing aid in one ear). Epidemiology
Globally, hearing loss affects about 10% of the population to some degree. It caused moderate to severe disability in 124.2 million people as of 2004 (107.9 million of whom are in low and middle income countries). Of these 65 million acquired the condition during childhood. At birth ~3 per 1000 in developed countries and more than 6 per 1000 in developing countries have hearing problems.Hearing loss increases with age. In those between 20 and 35 rates of hearing loss are 3% while in those 44 to 55 it is 11% and in those 65 to 85 it is 43%.A 2017 report by the World Health Organization estimated the costs of unaddressed hearing loss and the cost-effectiveness of interventions, for the health-care sector, for the education sector and as broad societal costs. Globally, the annual cost of unaddressed hearing loss was estimated to be in the range of $750–790 billion international dollars. The International Organization for Standardization (ISO) developed the ISO 1999 standards for the estimation of hearing thresholds and noise-induced hearing impairment.
Angiokeratoma is a benign cutaneous lesion of capillaries, resulting in small marks of red to blue color and characterized by hyperkeratosis. Angiokeratoma corporis diffusum refers to Fabrys disease, but this is usually considered a distinct condition. Signs and symptoms
Presentation includes telangiectasia, acanthosis, and hyperkeratosis.Presentation can be solitary or systemic.Multiple angiokeratomas, especially on the trunk in young people, are typical for Fabry disease, genetic disorder connected with systemic complications. Complications
In some instances nodular angiokeratomas can produce necrotic tissue and valleys that can harbor fungal, bacterial and viral infections. Infections can include staphylococcus. If the lesion becomes painful, begins draining fluids or pus, or begins to smell, consult a physician. In these instance a doctor may recommend excision and grafting. Pathophysiology
Histology
Angiokeratomas characteristically have large dilated blood vessels in the superficial dermis and hyperkeratosis (overlying the dilated vessels). Diagnosis
Due to the rarity of different types of vascular conditions, angiokeratomas may be misdiagnosed. A biopsy of the lesion can produce a more accurate diagnosis. Classification
Angiokeratoma may be classified as:

Angiokeratoma of Mibelli (also known as "Mibellis angiokeratoma," "Telangiectatic warts") consists of 1- to 5-mm red vascular papules, the surfaces of which become hyperkeratotic in the course of time. : 589  The disease is named after Italian dermatologist Vittorio Mibelli (1860-1910). Angiokeratoma of Fordyce (also known as "Angiokeratoma of the scrotum and vulva," though not to be confused with Fordyces spots) is a skin condition characterized by red to blue papules on the scrotum or vulva. Solitary angiokeratoma is a small, bluish-black, warty papule that occurs predominantly on the lower extremities.