Thanks for your query.
Well first of all I must mention that there might be many reasons for such eruptions.So a proper history and follow up is needed.Where did the spots develop?How they appear as?Are they just spots,nodules or pustules?Is there any pain associated?Keep informing here how the condition progresses.
One of the possible cause might be bite by parasitic insect Cimex lectularius commonly known as bed bug.When bed bugs bite, they inject an anesthetic
and an anticoagulant
that prevents a person from realizing they are being bitten. Most people do not realize they have been bitten until bite marks appear anywhere from one to several days and sometimes even upto 14 days after the initial bite.
Now for relief from the itch take Levocetrizine 5 mg tablets thrice daily for 5 days [ it may make u feel a bit sleepy which is side effect of levocetrizine, but dont worry]Keep your skin clean and dont stratch the red spots as it may cause secondary infection.It would be better to consult a Dermatologist
Take care and keep informing here how it progresses....