Hello,
I cannot confirm anything without examination but it can be contact dermatitis,
heat rash, pityriasis rosea or viral exanthematous
rash. Pityriasis rosea is a common human skin disease which presents as numerous patches of pink or red oval rash. The rash may be accompanied by low-grade headache, fever, nausea and fatigue and sometimes by itching.
No treatment is usually required. In most patients, the condition lasts only a matter of weeks or months(upto six months).