The lesions could be due to allergic reaction
from food/medicine that you have taken.Any lesion over the skin has to be clinically examined by a Dermatologist
for correct diagnosis.
The throat lesion can also be due to some lesion in the throat .Another possibilty is pharyngitis
.You should consult an ENT doctor for examination .
I prescribe antihistamine tablet,antiinflammatory tablet/steroid
tablet initially to my patients with similar complaints.
Wish you good health and speedy recovery