Urushiol can remain active for months, so wash all surfaces that come in contact with the plants thoroughly with water. The resin from poison oak spreads when you scratch the rash and then touch unaffected areas. Prescription-strength cortisone cream can help relieve the itching. If blisters form on the face or eyelids, see your doctor. In Southern California, mosquitoes can carry malaria and encephalitis, and the Mosquito and Vector Control Districts work to control the mosquito population.
Insect repellents are an effective way to drive mosquitoes away.
On older children, insect repellent can be sprayed directly onto their clothing. A new, all-natural insect repellent that uses soybean oil as the active ingredient is currently on the market. Reduce the mosquito population around your home by emptying buckets of water, flower pots and other containers that collect water. Don't use perfumed sunscreens and lotions, and avoid baggy clothes that can trap bugs. If an insect bite results in hives, swelling of the tongue, nausea or vomiting, rapid heartbeat, or difficulty breathing, seek medical help immediately.