Residents and visitors to the coast are being advised by East Lindsey District Council not to touch brown caterpillars that may be seen on the beaches and promenades.
The council said: “These caterpillars can cause some people to have an allergic reaction, such as skin irritation. It is expected that the caterpillars will have gone within the next two to three weeks.
“Anyone who is concerned following an adverse reaction should seek medical advice.
“We would like to reassure residents and visitors that it is still perfectly safe to visit the beaches and promenades to enjoy leisure activities.”