Most bruises form when small blood vessels (capillaries) near the skin's surface are broken by the impact of a blow or injury — often on the arms or legs. When this happens, blood leaks out of the vessels and initially appears as a dark mark. Eventually the body reabsorbs the blood, and the mark disappears.

2024年4月17日 · Have frequent, large or painful bruises. Have bruises that begin suddenly or seem to develop for no reason. Have a personal or family history of easy bruising or bleeding. Notice a lump form over the bruise, which may be a sign of pooling blood, also called a hematoma. Have unusual bleeding, such as from the nose or gums.

2023年6月8日 · Overview. Immune thrombocytopenia (ITP) is an illness that can lead to bruising and bleeding. Low levels of the cells that help blood clot, also known as platelets, most often cause the bleeding.

2021年9月21日 · Reddish-purple spots that look like bruises develop on the buttocks, legs and feet. The rash can also appear on the arms, face and trunk and may be worse in areas of pressure, such as the sock line and waistline. Swollen, sore joints (arthritis).

2023年11月1日 · To protect thin skin and prevent tears and cuts: Wear a long-sleeved shirt, long pants and a wide-brimmed hat. The forearms are common areas for minor injury to the ski

2024年10月23日 · Causes. Causes of itchy skin include: Skin conditions. Examples include dry skin (xerosis), eczema (dermatitis), psoriasis, scabies, parasites, burns, scars, insect ...

2023年12月16日 · Melanoma is a serious form of skin cancer. It often can be cured if found early. These melanoma pictures can help show you what to look for.

2005年7月24日 · Petechiae (puh-TEE-kee-ee) are pinpoint, round spots that form on the skin. They're caused by bleeding, which makes the spots look red, brown or purple.

Overview. Dermatitis is a common condition that causes swelling and irritation of the skin. It has many causes and forms and often involves itchy, dry skin or a rash.

2022年8月11日 · Causes. Common causes for a broken arm include: Falls. Falling onto an outstretched hand or elbow is the most common cause of a broken arm.