Delayed crawling or walking are the usual concerns that arise in infants with paralysis of the limb. In these cases, abnormalities of the legs are the main focus of the attention. Diagnosis
Monoplegia is diagnosed by a physician after a physical examination and sometimes after further neurologic examination as well. As monoplegia is fairly rare, after physical examination of a patient complaining of monoplegia, sometimes weakness of an additional limb is also identified and the patient is diagnosed with hemiplegia or paraplegia instead. After neurologic examination of the limb, a diagnosis of a monoplegic limb can be given if the patient receives a Medical Research Council power grade of 0, which is a measurement of the patients limb strength. Needle Electromyography is often used to study all limbs, essentially showing the extent in each limb involvement. Furthermore, magnetic resonance imaging (MRI) is the diagnostic modality of choice for investigating all forms of hemiplegia. It is especially informative to show migrational defects in hemiplegic cerebral palsy associated with seizures.An approach called single-pulse transcranial magnetic stimulation (spTMS) has also been used to help diagnose motor deficits such as monoplegia. This is done by evaluating the functional level of the corticospinal tract through stimulation of the corticospinal lesions in order to obtain neurophysiologic evidence on the integrity of the corticospinal tracts. Single-pulse transcranial magnetic stimulation provides neuropsychological feedback such as motor-evoked potentials (MEPs) and central motor conduction time (CMCT).
Miliaria crystalline
The most superficial obstruction (with the most mild clinical presentation), is known as miliaria crystalline; instead of a rash, the patient presents with multiple, tiny, blister-like lesions that look like beads of perspiration and essentially cause no symptoms. : 23  Miliaria crystalline is also known as miliaria crystallina, and sudamina. The superficial vesicles are not associated with an inflammatory reaction. : 23

Miliaria rubra
The most commonly encountered form of the illness is miliaria rubra, in which obstruction causes leakage of sweat into the deeper layers of the epidermis, provoking a local inflammatory reaction and giving rise to the typical appearance of redness (hence rubra) and larger (but still only a few millimetres), blister-like lesions. This form of the illness is often accompanied by the typical symptoms—intense itching or "pins and needles" with a lack of sweating (anhidrosis) to affected areas. : 23  A small risk of heat exhaustion exists due to inability to sweat if the rash affects a large proportion of the bodys surface area or the patient continues to engage in heat-producing activity. Miliaria rubra is also known as prickly heat and heat rash. Differential diagnosis should be used to rule out polycythemia vera, which is a rare hematological disorder and appears more often in males than females, generally not before the age of 40. Both disorders share a common trait of appearing after taking a hot shower.