How to treat mud fever in horses?

to treat the condition. This can be extremely challenging when stabling or hard standing is not available. 
Clipping away feathers and thick hair coat will help to allow the skin and lesions to dry
Remember skin cannot heal easily while damp contaminated hair is present. Many of these cases are extremely painful which can make clipping an agonising and potentially dangerous task. In these situations it may be necessary for your vet to attend to provide appropriate analgesia and sedation if necessary. In some cases it may be necessary to start treatment with an aim to make the horse comfortable enough to tolerate clipping.
If you do clip your horse remember that the clippers will become contaminated with bacteria from the scabs. Please ensure that you disinfect them between horses.  
One of the main aims of treatment is to remove the scabs from the skin
As previously mentioned scab removal can be extremely painful for the horse. In these cases covering the legs with an antimicrobial thick oilbased cream and allowing this to soak in will help to remove the offending scabs. It is very helpful to cover the legs with cling film under a layer of stable bandage to allow the cream to penetrate overnight. Once the cream has been given adequate time to penetrate and loosen the scabs they can be removed more easily by wiping the skin with a clean disposable cloth. It is important to dispose of this cloth after every use as it will be heavily contaminated with bacteria. 
It is also advisable to disinfect the surrounding area once the treatment is completed this is to avoid re contamination of the legs. It is advisable to treat the horse on an area of hard standing rather than in a stable where bedding could become contaminated. Any equipment and surface should be disinfected after each treatment.
Shampooing the legs with dilute shampoo in warm water will help 
It acts to reduce the scaling and crusting and so reduce the bacterial load on the skin and will also allow further penetration of antimicrobial cream. Dilute chlorhexidine is often used for this but this can be quite drying on the skin. Commercially available shampoos containing colloidal oatmeal may result in better preservation of the skin. 
Your horse may need pain relief 
This is usually in the form of antiinflammatories such as phenylbutazone which can be prescribed by your vet. Occasionally cases may