Limbs of ripening mrs withering away

As the title suggests.. there is a plant and some of its stems.. the ones hidden under the leaves mostly are withering away.. like wilting/drying.. is this lack of sunlight? should i pick them? they have brown hairs.. but still some white.. hmm I dont know..

Lower leaves that dont get enough light die.
look at it this way. If the leave looks less than half alive I pull it.