Isolation is a common problem with PhD students because they primarily work alone. Their social life becomes more restricted. However, friends who work in offices have a far more social life.n2. Completing a PhD course can be stressful with the deadlines, pending project work and personal investments. As completion of PhD is not teamwork, the pressure falls on the student alone. Mental stress and disorder are prevalent in PhD students.n3. PhD can become complicated when the supervisor or mentor is not motivating or cooperative.n4. Arranging funds can also be challenging for a PhD student. Insecure funding could lead to stress so that students can commit suicide.