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.
I've also been stung right under my lower eyelash and had the pain last for a couple days. The Mayo Clinic recommends that if the symptoms haven't gone away in a few days (I'd say 3-4) to make an appointment with a doctor to have it checked out. @Bee stings Symptoms - Mayo Clinic. According to the Mayo Clinic, you shouldn't wait if you are having a severe allergic reaction to the sting, if you were prescribed an emergency epinephrine autoinjector, or if you've been swarmed by bees and have multiple stings (I'd say 8-10+).