To stretch shoes with alcohol, make the solution, wet the shoes and wear them with thick socks. Other methods for stretching leather shoes include freezing them and using a blow dryer.
To make the solution for stretching the shoes, mix one part rubbing alcohol to one part water in a spray bottle. Shake the mixture well, and spray the solution liberally inside the shoe. Concentrate on areas that are especially tight. The leather should be damp after spraying.
Put on a pair of thick socks, and pull the shoes on. Wear the shoes for several hours this way. Remove the socks and shoes, and check the fit. Repeat the procedure if necessary.
Another option is to dampen socks in the alcohol solution. Put on a pair of thick socks and the dampened socks over these, and then wear the shoes for several hours.
To stretch shoes using the freeze method, line the interior of each shoe with a plastic bag. Fill the bag with water, and secure tightly. Place the shoe in the freezer, and freeze overnight. Remove the bag.
To stretch shoes using the blow dryer method, put on the shoes while wearing thick socks. Aim a blow dryer on the highest heat setting at the tight areas. Flex and stretch your feet. Wear the shoes until the leather cools back down. Apply shoe lotion to the exterior afterward.