The good news is that there are no poisonous insects in Barbados.
There are however, a few annoying creatures. Sandflies tend to emerge at dusk; some people are not bothered by them at all while others, especially those with sensitive skin, may have a mild reaction with slight rash and some itching.
Mosquitoes can be a problem during the rainy season (June-December). Mosquitoes are most active at dawn and dusk.
Insect repellants keep both mosquitoes and sand flies at bay.
Some mosquitoes may carry dengue fever. Symptoms include joint and muscle pain, swollen lymph nodes, headache, fever, exhaustion, and rash. Dengue fever is caused by a virus so there is no specific antibiotic to treat it. Instead treatment consists of relieving the symptoms. If you experience these symptoms, consult a doctor.