Yup. Increase in circuit resistance will make the signals blink faster....which is why you often change to a slower flasher when towing a trailer with lights.
You most likely have a poor ground, a flasher on its way out, or a bulb on its last legs.
1992 Ford Bronco
E4OD- B&M Stage 2 shift kit
Full 3" stainless Bassani Exhaust
32" BFG's/stock suspension
"No replacement for displacement."
"Our lugnuts require more torque than most Honda's produce!"