thanku for your query,
Well nothing to be worried about because it is not Herpes at all , as herpes is very painful disease and the blisters are pimple like with clear fluid in them. It seems like atopic dermatitis
that is allergic rash
. Advice him to maintain hygiene and apply caladryl
lotion frequently there . wear loose cotton clothes , and take some anti allergic tab like cetrizine
once or twice .
i hope i have answered your concern