First looked like two big swollen mosquito bites. After a couple days the swollen area had little tiny red dots. Also around the cluster of tiny red dots a few bug bites started appearing around my butt cheek. The area is painful and itchy. Please help
HiT hank you for asking Chat Doctor. I have gone through your query. Your problem can be most likely due to bug bites. Check your bed for bed bugs or its excreta. Usually bed bug bites will come in clusters. Another possibility is scabies. In such case there will be pores in the rashes, and it will spread also. If you send a picture it will be more helpful to identify. Local calamine lotion application and over the counter antihistamine like Ben Chat Doctor.  If no improvement then better approach a dermatologist to rule out the condition and to manage it. Hope this may help you. Let me know if anything is not clear. Thanks.