Hello,
The symptoms are suggestive of hands, foot and mouth disease which is caused by Coxsackie’s virus. Symptoms of fever, poor appetite and sore throat can appear three to five days after exposure. A blister-like rash on the hands, feet and in the mouth usually develops one to two days after the initial symptoms.
There is no specific treatment. Treatment is aimed at fever control and maintaining good oral hydration. Take adequate fluids throughout the day and acetaminophen if there is any fever.
If the symptoms persist or become severe then please consult a physician. Impetigo has to be ruled out.
I hope it helps. Take care and please do keep me posted in case you have any additional doubts. Kind regards.
I am not a doctor but, it sounds like hand, foot and mouth disease. A viral infection.