I've got a toothache

(a)  

I've got a back ache

(a)  

My knee aches

(a)  

My leg aches

(a)  

My foot aches

(a)  

My nose aches

(a)  

I've got ear ache

(a)  

I've got a headache

(a)  

I've got a stomach ache

(a)