I've been taking Tamoxifen for about 6-8 months.
Have had chemo ,radiotherapy and two years on Femara.
Since going onto Tamoxifen I have had brittle and sensitive nails.
My toenails become so sore after walking or exercise that I can't even have a bed sheet touch them in bed.
The biggest problem is from covered shoes but sometimes even the friction caused with open sandals hurts my toenails and makes them ache.