Is skin cancer recurrence serious?

Skin cancer is a type of malignant tumor, and many people have a certain understanding of it. In particular, the damage it causes is difficult for us to estimate, so we should have a correct understanding of skin cancer so that we can detect the disease in a short time. So is the recurrence of skin cancer serious? What are the symptoms of skin cancer when it occurs?

The first type of skin cancer is malignant melanoma, which has two characteristics:
One is asymmetry. If the mole is asymmetrical in shape and the surface is not smooth, you should pay attention to it.
Second, the edges are rough and sometimes have cracks, which is the exact opposite of the smooth edges of normal moles.
Third, the colors are mostly mixed, especially brown or ink black, and sometimes red, white and blue.
Fourth, it is greater than 1/4 cm.
The second and third types of skin cancer are basal cell carcinoma and squamous cell carcinoma, which have three characteristics:
First, the parts exposed to the sun, such as the head, neck, back of the hands, chest, back, etc., if it is a sudden growth, and it does not disappear for a long time, then you should pay attention to it. You should also be vigilant about acne that does not disappear for a long time.
The second is bleeding. These two types of skin cancer will bleed after only a slight stimulation, while most common skin diseases do not have this characteristic.
The third is the scab condition. If the skin scabs for no reason, especially if the scabs do not disappear for a long time, you should pay close attention.