How to distinguish between flea bites and hives (urticaria)

The differences between flea bites and urticaria are mainly reflected in the following aspects: 1. Etiology: Flea bites are caused by a skin inflammatory reaction when flea secretions enter the skin after being bitten; urticaria, on the other hand, is usually caused by skin allergic reactions due to food allergies, drug allergies, infections, or other factors. 2. Symptoms: After a flea bite, the skin may develop red spots, rashes, red patches, or even papulovesicles and blisters, accompanied by significant itching. In severe cases, infection and suppuration may occur. Urticaria manifests as wheal-like skin lesions of varying sizes and different shapes, accompanied by itching. It may also be associated with systemic symptoms such as nausea, vomiting, and abdominal pain. 3. Treatment: After flea bites, symptoms can generally be relieved by applying calamine lotion, peony phenol ointment, or similar medications, and maintaining local cleanliness and hygiene. For urticaria, antihistamines such as loratadine tablets and cetirizine hydrochloride capsules can be used for treatment. In severe cases, corticosteroids may be used in combination. 4. Contagiousness: Flea bites are generally not contagious; although urticaria itself is not directly transmitted through contact, its allergens might affect others indirectly.