If your skin got dry and irritated caused by chlorine or salt water.

Try using hydrating, soothing agent such as glycerin or calming cream, you can find some in the store.

During camping and you get a red, itchy rash due to poison ivy or poison oak.

You can reduce skin irritation by applying some anti-inflammatory like hydrocortisone or some available products can be found in the shop such as cooling sprays or skin relief crème.

To reduce itchiness due to insect bites. Try some antibacterial like tea tree oil or cooling agents like camphor.