You have not mentioned your age, sex or duration of symptoms. Although, with the information provided it looks like you develop rashes mainly at night, while in bed. Since these areas of the body come in contact with the bed, dust mites could be the possible cause of your symptoms. You may visit your family doctor to rule out other (infectious) causes of rashes. However, an Allergy Specialist will be able to confirm your allergy status. All the best!
These Q&A’s are for educational purposes and should not be relied upon as a substitute for medical advice you may receive from your physician. If you have a medical emergency, please call 911. These answers do not constitute or initiate a patient/doctor relationship.