I have these small red patches with bumps in them all over my body. My stomach and lower back were really red and I also have bumps in my groin area.?

Body rash. Likely pityriasis roasea which will go away on own in 6-8 weeks or eczema/psoriasis , bacterial or fungal, tinea vesicolor or related to allergy- medications ( if on any) or food -like celiac, can also be bites like scabies usually are linear pattern, rarely can be thyroid, or liver /kidney condition, autoimmune process. Would check CBC, thyroid , ESR. F/u w/urgent care or doc over next 1-3 d.