Talk to Gastroenterologist on Constipation

Baby having constipation issue off n onn from 6 months.. in first 1.5 yr he never had constipation issue even gor once.. but from 6 months off n on 2 weeks k bad phr issue ho jata n 2 3 din chlta rhta .. par 1 month sa week normal guzarta thn constipation ho jate n 3 4 days yeh issue chlta rhta ais bar to week ho gya constipatiom ossue resolve nhe ho rha duphalac fiber castor oil daily basis pa dai rhe phr bhe mushkil sa pas kr rha stool n glycerine depositeries wesa he bahr a jate witjout melting. Wht test should b done to find out the real cause. Keuk fiber intake bhe acha hai water imtake bhe sahi hai dhood phla 1 litter leta tha n a day vo bhe ab 0.5 litter lr dya .enfamil pa switch kr rk bhe dekha cow n buffalo pa bhe par no change.kindly guide mai wht to do i m v worried.baby hb iz 11 n rbc quantity is more n presence of pencil n tunnel cells..