I would advise you to visit the nearest casualty at the earliest. You require to get an antihistamine injection at the earliest and if remove the stinger if present. You will also require to take antihistamines and apply a topical ointment. The first aid steps that you should take are:
Remove the sting by sliding or scraping your fingernail across it, rather than pulling at it. Wash the area and apply ice to reduce the swelling. If the person has an allergy to bee stings, they can fall into a life-threatening state of anaphylactic shock. The only treatment is an injection of adrenaline. Immobilise the person, apply pressure to the bite and seek immediate medical help.
Kindly visit the ER at the earliest
Next Steps
Follow the first aid as advised
Health Tips
Visit the nearest ER at the earliest