"Underarm" redirects here. For the bowling style in cricket, see Underarm bowling
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The axilla (or armpit, underarm, or oxter) is the area on the human body directly under the joint where the arm connects to the shoulder. It also provides the under-arm sweat gland.
Anatomically, the boundaries of the axilla are:
The contents of the axilla include the axillary vein and artery, as well as the brachial plexus, lymph nodes and fat. Axilla is the space between the side of the thorax and the upper arm.
Contents of the axilla
The term "underarm" typically refers to the outer surface of the axilla. However, the terms are sometimes used interchangeably in casual contexts. Colloquially, armpit refers to an object or place which is smelly, greasy, hairy or otherwise undesirable.
The term oxter is most often used in the United Kingdom  and the Republic of Ireland. In Northern Ireland "oxter" generally replaces all other names for the armpit.
Main article: Underarm hair
Underarm hair usually grows in the underarms of both females and males, beginning in adolescence. In some modern Western cultures, it is common for both men and women to remove underarm hair for aesthetic reasons. As underarm hair grows quickly, shaving must be performed frequently, or else stubble will appear in the axilla.
Throughout the feminist movement, previously in the hippie culture, and in some areas of the punk rock scene, some women choose to keep their underarm hair for a variety of reasons, from subversion to egalitarianism to comfort. Conversely, some men choose to remove their underarm hair for similar aesthetic reasons or to reduce friction in some sports, such as swimming.
Male arm pit with hair
Female arm pit shaved
Arm pit in development
Excessive perspiration can result in axillary intertrigo. Intertrigo is an inflamed skin condition caused by heat, friction, and moisture. A warm, wet armpit may accommodate the growth of pathogenic bacteria, yeasts, and fungi. The condition is responsible for rash-like symptoms, pustules, or chronic itching or burning in the armpit. Axillary intertrigo is common among those who work in hot environments.
|Anatomy of the axilla|
Superficial muscles of the chest and front of the arm.
Axillary artery and its branches - anterior view of right upper limb and thorax.
The veins of the right axilla, viewed from in front.
The right brachial plexus (infraclavicular portion) in the axillary fossa; viewed from below and in front.
The left side of the thorax.