Hello,
I cannot confirm anything without examination but it can be due to allergies, viral infections, scabies or hives. Scabies is an infestation of the skin with the Sarcoptes scabiei mite. It is characterized by intense itching
, usually at night and by small insect-type bites lesions on the skin. Diagnosis of scabies is made by scraping the skin and viewing the material under a microscope to see the characteristic mite or eggs.
I suggest you to get it evaluated from a dermatologist to confirm the diagnosis.