The pimples you're describing could be sebaceous cysts, also known as "lipomas" or "fatty lumps," which are common on the scrotum. These are generally harmless and occur when oil glands or hair follicles become blocked. If they don’t cause pain or discomfort, they usually don’t require treatment. However, if they grow in size, become painful, or infected, it’s best to consult a doctor for further evaluation and possible treatment.