Tomato problem

[workhorse]

I have noticed that a small number of the green tomato's have brown patches on them, while other look a little crinkled. Is this due to under watering?

[Kristen]

Have a Google for Blossom End Rot and see if that looks like the problem (if so, yes, its watering - or lack of!)

[workhorse]

Once again, thank you for your assistance.