Do the red spots last for less than 24 hours.
If you have this problem for less than six weeks, then we will think of acute urticaria. If the duration is longer than six weeks then we will call it as chronic urticaria.
Oral antihistamines and topical calamine lotion will be of help. The type of antihistamine and duration of treatment can be best decided by your doctor. He/she might also opt for routine investigation.

Chemicals to clean the machine, dust from equipment...any of them could be the cause. Your doctor can best decide it. Please consult him at the earliest.
Regards
Dr Amit

Hello
Welcome to healthcare magic
You seem to be suffering from Acute urticaria. It is characterized by itchy red or skin colored raised wheals which is transient, that means appears in one place and soon disappears from there to appear somewhere else. The most common cause of acute urticaria is food. Seafood, meat, poultry, egg, milk, apples, brinjal, strawberry, coloring agents etc are commonly implicated. It is subjective and any food can cause it. Other common causes are medicines, infections, insect bites etc.
I was thinking about your new routine of gym, there is a rare type of urticaria which is triggered by exercise and sweating, we call it Cholinergic urticaria which happens when your internal body heat increases. It will have itchy bumps which will look like a bigger version of goose bumps around your hair follicles.
You can take anti histamines like cetrizine 10 mg or Fexofenadine 180 mg once daily.
Hope this helped
Take care

Hi, you are having generalised pruritus with papular eruptions. So it seems that you are having either prurigo, lichen urticatus or dermatitis.. Allergic or irritant. In any case, you should be investigated to rule out internal diseases.. DM, Anaemia, or internal diseases. You should remain away from irritants and allergens for few months.. As chemicals in gym, dust, fume, pollens, soap, beauty cream and powders, deodorants, perfume...etc. avoid pruritogenic diet.. Fish, prawns, colored cold drinks, brinjals,curd, cows milk and its products, fermented food... etc. Take antihistaminics till itch is relieved, steroid in tappering dose for 4 weeks. Apply moderate potency steroid cream twice a day. Dettol liquid bath. .. I hope you will be recovered. Still, you consult nearby dermatologist... Ok