What Are Lesions?

Lesions are abnormal changes in the structure or function of tissues in the body. They can occur in various parts of the body, including the skin, organs, and bones, and can be caused by a wide range of factors, including injury, infection, inflammation, or underlying medical conditions. Lesions may appear as areas of abnormal tissue growth, discoloration, or damage, and they can vary widely in size, shape, and appearance.

Skin lesions are abnormalities or changes in the skin’s texture, color, or appearance. They can include moles, warts, cysts, acne, rashes, blisters, ulcers, and sores. Skin lesions can be benign (non-cancerous) or malignant (cancerous). The treatment and management of lesions depend on their underlying cause and nature. Some lesions may resolve on their own with time or with appropriate medical treatment, while others may require surgical removal or other interventions.

What Causes Lesions?

Injury or Trauma

Physical trauma or injury to the body can cause lesions. This may include cuts, abrasions, bruises, burns, or wounds resulting from accidents, falls, or other traumatic events.


Infections by bacteria, viruses, fungi, or parasites can lead to the formation of lesions. For example, bacterial infections such as cellulitis can cause red, swollen, and painful lesions on the skin, while viral infections like the herpes simplex virus can cause cold sores or genital lesions. Fungal infections such as ringworm can also lead to skin lesions.

Inflammatory Conditions

Various inflammatory conditions, such as dermatitis, psoriasis, eczema, or autoimmune diseases like lupus, can cause lesions on the skin or internal organs. Inflammatory bowel diseases like Crohn’s disease and ulcerative colitis can lead to lesions in the gastrointestinal tract.

Allergic Reactions

Allergic reactions to foods, medications, insect bites, or other allergens can result in the formation of lesions such as hives, welts, or eczema.

Genetic Factors

Some individuals may be genetically predisposed to developing certain types of lesions or conditions that lead to lesion formation.

Environmental Factors

Exposure to environmental toxins, chemicals, or radiation can damage tissues and lead to the formation of lesions. For example, exposure to ultraviolet (UV) radiation from the sun can cause skin lesions such as sunburns, sunspots, or skin cancer.

Corrective Treatments