If redness is also there along with severe itching you need a proper consultation, online if physical is not possible. To get some relief you can take a levocetrizine 10mg tablet from a nearby chemist , until you go for consultation. if its red bumpy lesions with itching it could be urticaria, which itself could be because of multiple causes. hope it helps!
Next Steps
Since its two days better consult a dermatologist
Health Tips
avoid sour foods, artificial color foods, avoid fermented foods