There are a few possible explanations for why you may feel like there are raindrops on your skin. It could be a symptom of a condition called paresthesia, which is characterized by abnormal sensations like tingling, prickling, or burning. Paresthesia can be caused by nerve damage, compression, or inflammation. Another possibility is that you are experiencing a phenomenon called ghost rain. Ghost rain is a type of pareidolia, which is when people see or hear things that are not actually there. This is often caused by a combination of fatigue and anxiety. If you are concerned about the sensations you are experiencing, it is best to consult with a medical professional.