HONOLULU -- Box jellyfish are expected to litter south shores on Oahu this weekend, according to the city's Ocean Safety Division.

Beaches on the south shore such as Ala Moana, Waikiki, Hanauma Bay and Pokai Bay are usually affected. Makaha Beach is also commonly hit during jellyfish inundations.

The jellyfish can cause a painful sting that can be dangerous for those who are allergic to the toxins.

Officials said that pouring vinegar over the affected areas can help ease the sting. Anyone who suffers breathing problems, muscle spasms or constant pain should get immediate medical attention, ocean safety officials said.