Beware of 4 abnormal finger conditions that may indicate serious illnesses:

1. Numbness: Frequent numbness in the fingers may be caused by cervical spondylosis, diabetes, or hypertension.

2. Tremors: Continuous hand tremors in young people may be related to hyperthyroidism, while tremors in the elderly may indicate a risk of Parkinson's disease or senile dementia.

3. Swelling: Arthritis can cause finger swelling.

4. Discoloration: Discoloration of the fingers may be a sign of Raynaud's syndrome, which can lead to local ischemia and hypoxia, as well as diseases such as ischemic necrosis, osteomyelitis, and sepsis.