Hi. Did you check specific allergies to specific foods including milk or anything else that you are giving? Also is he taking all nutrition he needs to for his age?

Tip. try giving him lots of fruits which will help build his immunity . eg. Orange, mosambi, banana

Also check these articles. Will be very helpful
http://www.babychakra.com/learn/1087-what-to-feed-when-your-child-is-down-with-cold-cough-fever-or-diarrhea

http://www.babychakra.com/learn/970-what-no-one-ever-told-you-about-your-child-s-cough

http://www.babychakra.com/learn/971-why-you-must-stop-worrying-about-your-kid-s-common-cold

give him ajwain kaa sek immediately after his bath...do it atleast for a month n c the difference..it does not have side effects n works wonders for me

As advised by Babychakra expert Dr Aarushi Upadhyay.

Children don't have much immunity , n giving medicines every 15 days Wil spoil immunity further.
I suggest try homoeopathy immunity medication
Once that improves falling sick Wil decrease to a gr8 extent

yaa...even that's a gud idea ..one of my cousin did the same for her kid..now he is perfectly okay

ajwain ka sek means

make ajwain ki potli n keep that cloth potli on a hot tawa. as the potli will b bit hot ..put that potli on a covered chest of baby. cover ur baby's chest with soft muslin cloth..it works for me hope it works for u as wel

Ajawain ka sek means I dont knw...bcoz im a hindus...im nt understanding plz tell me