If you cannot afford to go to the vet, try asking at your local shelter for ideas. Some local shelters offer vet assistance and may even know a vet that can provide cheaper services to you. try a bath with oatmeal in it to soothe the dog until you can take him in (just enough raw oats to make the water look milky - have him rest in the water for about 5 minutes and rinse, but do not use shampoo). You absolutely must seek care, though, through some means. If the shelter won't help, go to Planned Pethood (www.plannedpethood.org).