Unsaturated pyrrolizidine alkaloids are hepatotoxic, that is, damaging to the liver. PAs also cause hepatic veno-occlusive disease and liver cancer. PAs are tumorigenic. Disease associated with consumption of PAs is known as pyrrolizidine alkaloidosis.
The venom is what causes the symptoms. The main symptoms are pain, itching, swelling and redness at the sting site. Severe pain or burning at the site lasts 1 to 2 hours. Itching often follows the pain. Swelling. The bee sting may swell for 48 hours after the sting. The swelling can be small or large.
Relieving the Swelling. See your doctor immediately if you have facial swelling. If a venomous bee sting caused the swelling, remove the stinger immediately. Donât use tweezers to remove the stinger â tweezers can pinch the stinger, causing it to release more venom.