It is an allergic reaction to cold and dampness in susceptible individuals. There is patchy constriction of blood vessels of the skin associated with it. It may progress to trench foot if not treated adequately.
The condition is diagnosed by the following features.
- The toes become red. There is intense itching
- Severe pain develops.
- Blisters and ulcers may develop.
- Warm the part gradually.
- Shift him to a doctor’s clinic.