Skin lesions
Skin Lesions
Skin lesions (/skɪn 'li:ʒən/) are areas of skin that appear different from the surrounding tissue. They can be a result of damage or injury, or may be caused by a wide variety of conditions and diseases.
Etymology
The term 'lesion' originates from the Latin word 'laesio', which means 'injury'.
Types of Skin Lesions
There are several types of skin lesions, including:
- Macule - A flat, discolored spot on the skin.
- Papule - A small, raised bump on the skin.
- Nodule - A larger, solid, raised bump on the skin.
- Vesicle - A small, fluid-filled blister on the skin.
- Bulla - A large blister on the skin.
- Pustule - A pus-filled bump on the skin.
- Cyst - A closed sac under the skin filled with fluid or semi-solid material.
- Wheal - A raised, itchy area of skin that is often a sign of an allergic reaction.
- Ulcer - An open sore on the skin or mucous membranes.
- Tumor - An abnormal growth of tissue.
Causes of Skin Lesions
Skin lesions can be caused by a variety of factors, including:
- Infection - Bacterial, viral, or fungal infections can cause skin lesions.
- Allergic reaction - Allergies to substances such as drugs, chemicals, or foods can result in skin lesions.
- Autoimmune diseases - Conditions in which the body's immune system attacks its own cells can lead to skin lesions.
- Cancer - Certain types of cancer, such as skin cancer, can cause skin lesions.
Diagnosis and Treatment
Diagnosis of skin lesions typically involves a physical examination and may include a biopsy for further testing. Treatment depends on the underlying cause of the lesion and may include topical treatments, systemic medications, or surgical removal.
External links
- Medical encyclopedia article on Skin lesions
- Wikipedia's article - Skin lesions
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