The sensation of being itchy all over can have multiple causes. Common reasons include:
- Dry skin, especially in hot or cold dry weather or from using soap, leading to rough, flaky skin that itches.
- Insect bites, which often cause red, swollen, and itchy bumps.
- Allergic reactions or hives, which present as raised, itchy rashes.
- Skin conditions like eczema, psoriasis, or scabies, which cause itchy rashes or patches.
- Heat rash, causing red or pink spots or blisters, often itchy.
- Other systemic causes such as pregnancy-related conditions, certain medications, kidney or liver disease, thyroid problems, infections like HIV, or even some cancers.
If the itching is severe, widespread, persistent, or accompanied by other symptoms like rash, swelling, or difficulty breathing, it's important to seek medical advice for proper diagnosis and treatment.