A wheal lesion is a raised, swollen area on the skin that's often itchy and changes shape. Think of it as a welt or hive. It's characterized by its elevated, discolored appearance and can be caused by various factors, including insect bites, allergic reactions, eczema, or minor wounds.
Understanding Wheal Lesions:
- Appearance: Wheals are elevated patches of skin that are discolored and change in size and shape. They are usually itchy.
- Causes: Several factors can trigger wheal formation, such as:
- Insect bites and stings
- Allergic reactions to substances that touch the skin
- Eczema
- Other minor skin injuries
- Synonyms: Wheals are also commonly known as welts or hives.
- Duration: Typically, a wheal will last for less than 24 hours.
- Medical Context: Wheals are a key characteristic of urticaria (hives), a mast cell-dependent condition often involving angioedema (swelling deeper in the skin). A single lesion of urticaria is a wheal, resulting from short-lived edema in the upper and mid-dermal skin layers.
Examples of Wheal-Causing Conditions:
- Insect bites: Mosquito bites or bee stings often result in itchy wheals.
- Allergic reactions: Contact with certain plants (like poison ivy) or allergens can produce wheals.
- Urticaria (hives): This condition is characterized by the appearance of multiple wheals across the body.
Treatment:
Treatment depends on the underlying cause. Antihistamines are often used to reduce itching and flatten wheals, especially in cases of urticaria. For severe reactions, medical attention may be necessary.
Note: This information is for general knowledge and should not be considered medical advice. Consult a healthcare professional for any skin concerns.
