Conservative treatment implies immobilization of the limb (temporary splint) - to relieve stress from the sore arm.
The main medicines are pain relievers. In order not only to relieve pain, but also to reduce swelling in cases of nerve compression in the spiral and other radial tunnels, neurologists recommend taking non-steroidal anti-inflammatory drugs (NSAIDs) - Ibuprofen and its analogues.
More information - Neuralgia tablets
Injections of corticosteroids (hydrocortisone) may be prescribed, which bring relief after one to one and a half months in almost 70% of cases, but do not guarantee complete relief from the symptoms of neuropathy.
The drug of the group of anticholinesterase parasympathomimetics Amiridin (other trade names - Axamon, Neuromidin) is injected, which helps to improve neuromuscular transmission. Contraindications to its use include bronchial asthma, angina pectoris, decreased heart rate, intestinal obstruction, exacerbation of gastric and / or duodenal ulcers. And among the side effects are noted: general weakness, dizziness and heart rhythm disturbances; increased secretion of saliva, sweat and bronchial secretions; allergic reactions. 
It is recommended to take B vitamins, as well as vitamin N - lipoic acid .
Almost the entire range of procedures that physiotherapeutic treatment uses, which is necessarily carried out for neuropathies (according to the treatment protocol), includes electrical impulse stimulation, exercise therapy, massage, etc. This issue is covered in detail in the article - Physiotherapy for neuritis and neuralgia of peripheral nerves . 
The last option - surgical treatment - is carried out when conservative therapy, including courses of physiotherapy, has not yielded positive results for 12 months. Surgical intervention consists of decompression of the trunk or branch of the ulnar nerve (for example, excision of scar tissue), as well as tendon or muscle transposition. More information in the material - Surgical Pain Management
According to experts, good results of such operations are achieved, on average, in 70% of cases, and rehabilitation can last up to one and a half years - to restore motor and sensory function. At the same time, the key condition for successful rehabilitation is the implementation of physical exercises, individually prescribed by a specialist. 
What can alternative treatments offer in this case? Pain relief and puffiness relief with:
- alternating warm and cold compresses on painful areas; is one - a light massage of the same places with warmed camphor or mustard oil (with the addition of a few drops of rosemary, thyme or lavender essential oils);
- doing exercises that stretch and relax the muscles of the shoulder and forearm.
For the treatment of numbness of the hands, it is advised to make warming compresses, alternating with cold ones.
Herbal treatment, the effectiveness of which in this pathology is questionable, includes:
- compresses with decoction of autumn crocus bulbs (related to poisonous plants);
- compresses from fresh cabbage leaves (with honey), burdock leaves or garden geranium;
- for oral administration of decoctions / water infusions of peppermint, birch leaves or valerian roots.