According to symptoms... it is called as urticaria.
Urticaria present as red rashes/raised lesions/wheals will be there on the skin for sometimes,goes off & repear little later on....
It may be due any sought of infections in the body(viral,bacterial,fungal),Ingestion of food,drugs,Inhalation of dust,Infestation of worm(parasital),Implants(bony or dental),Idiopathic (exact cause is not known,may be psychological)... etc.
Next Steps
Go for following investigation
CBC with AEC,
LFT,RFT,URINE ROUTINE,FBS.,SERUM
LIPID PROFILE.
if its already checked no significance in the report means can start
Tab.Teczine Cp daily night for 30 days.
tab.bandy plus 1 tablet stat.
tab.Af 200 mg 1 tab stat.
calosoft plus lotion -can apply on rashes whenever it appears.
Health Tips
please do consult Dermatologist once for confirming the diagnosis & further treatment & evaluation.