What are the effects of crying too much due to sadness?

Sadness is the prob. Crying is obviously the result of the sadness. The important question why is there so much sadness? It may be related to problems, conflicts, loss, disappointments, relationships etc . It is also possible that there is an underlying mood disorder. What is needed here is a mental health evaluation. The solution will probably be some kind of psychotherapy possibly with medication .
Crying all the time. There are no bad effects of crying. Crying is a way to express feelings and it can be part of the healing process.