Do you remember any exposure to any specific chemicals etc? Or any trauma to the site or insect bite , etc?
This could be allergic reactions to unknown substances, skin hypersensitivity, eczema, dermatitis or sun rash.
Do you notice the lesions trigerred in response to a specific stimulus like sun exposure, some substance related to your work place?
Apply calamine lotion at the site and take some oral antihistamine medications like cetrizine or loratadine for your complaints.
If the symptoms are still persistent, consult your dermatologist and get a proper clinical evaluation done.
Let us know if you have any doubts and keep us posted on how you are doing.
every year around Febuary or March or both i get red blotches on my arms and legs. It's NEVER on my face or torsoc except for a little on my chest. they ich and they last about 3 or 4 weeks. they disappear very slowly. They are like red welts. I have been to the doctors and he gave me Triamcinolone Acetonide cream, but it doesn't seem to help. Last year i got in in Febuary and it went away after about 4 weeks then surfaced again in April ! It's so embarrassing and everyone is affraid of it and won't come near me when I have it! any ideas what it could be ???????