What insect bite leaves a small cluster and no itching?

A bite from a spider, such as a brown recluse or a black widow, can sometimes leave a small cluster of red or swollen spots with little to no itching. Other possibilities include bites from certain types of flies or mosquitoes, which may also present similarly without significant itching. However, individual reactions can vary, so it’s essential to monitor any bite for changes or signs of infection. If concerned, consulting a healthcare professional is advisable.