Essential Tremor: This condition is characterized by tremors that can occur in various parts of the body, including the hands, arms, head, or voice. It's often most noticeable upon waking and can be unilateral. Essential tremor is a common movement disorder that can have a significant impact on daily activities.

Parkinson's Disease: Although Parkinson's disease typically presents with bilateral symptoms, it can start unilaterally. The tremors are often more pronounced at rest and may decrease with voluntary movement. Early morning tremors can be a feature.
Dystonia: This condition involves involuntary muscle contractions, which can cause repetitive movements or abnormal postures. It can present unilaterally and may be more noticeable in the morning.
Orthostatic Tremor: This rare form of tremor occurs when standing and is characterized by a feeling of unsteadiness or tremor in the legs. However, some patients might experience symptoms upon waking as they stand up.

Stroke or Transient Ischemic Attack (TIA): Although less common, a stroke or TIA can present with sudden onset of tremor, among other symptoms like weakness, numbness, or difficulty with speech. It's crucial to rule out these conditions due to their potential for severe consequences if missed.
Multiple Sclerosis: This autoimmune disease can cause a wide range of neurological symptoms, including tremors. The symptoms can be unilateral and may worsen in the morning.
Brain Tumor: A tumor in the brain can cause focal neurological symptoms, including tremors, depending on its location. Early detection is critical for treatment and prognosis.

Wilson's Disease: This genetic disorder leads to copper accumulation in the body, particularly in the liver, brain, and other organs. Neurological symptoms can include tremors, which might be unilateral and more pronounced in the morning.
Neurodegenerative Disorders (e.g., Progressive Supranuclear Palsy, Corticobasal Degeneration): These conditions are rare and can present with a variety of symptoms, including tremors. They are often associated with other neurological signs and symptoms.
Vitamin Deficiencies (e.g., Vitamin B12 Deficiency): Certain vitamin deficiencies can lead to neurological symptoms, including tremors. These deficiencies are more common in specific populations and can often be treated with supplementation.