In his horoscope Moon rules the 2nd house of speech and Mercury is the significator . Moon is in an inimical distance and Mercury is conjoined with Rahu and combust with Sun. He is right now in the main period of Rahu Mahadasha. The severe affliction is there but gradually it should improve. Also you may do the below remedies.
1. Give him lot of Milk.
2. Make him wear Silver , can be a karka or chain.
3. Sahut Mung dal / Khichdi
4. Donate something from his Hand every Saturdays.