My baby is not eating or drinking properly, he is 7.5 month, i noticed the 3rd tooth has started to pierce through his gums, please can i get advice to help sooth/ feed him ?

Growth chart?: Is he falling off the curve on his growth chart? Has he lost weight? If so, take him to the doc. It could be the teething. Rub his gums w/ a frozen wet cloth, and try teething biscuits, teething rings & cold foods like cold applesauce. Here's some valuable info. https://health.clevelandclinic.org/teething-101-4-pediatrician-approved-ways-to-soothe-a-teething-baby/ Congrats on the new sweetheart!

Teething: Get 2 teething rings. Refrigerate them. When cold give him one to chew on. When it warms, switch with the cold one. Make sure to clean his gums daily (ask a Pedodontist). Make sure he doesn't get dehydrated. Never put him to bed w a bottle. As 1st teeth have erupted, it's time for him to see a Pedodontist, a Pediatric Dental Specialist.