What is the reason why red spots or red lumps appear when the skin is scratched

If the skin is itchy, red spots or lumps will easily appear if you scratch it. This is not just due to skin sensitivity. In many cases, if there are some diseases in the body, such as diabetes, liver disease, kidney disease, etc., these symptoms may appear.

1. Bile acid concentration is too high:

When the concentration of bile acid in the blood increases, it will be deposited in the skin, causing severe skin itching. Therefore, when your skin becomes itchy and yellow, you should go to the hospital to check your liver and gallbladder to see if you have gallstones. Excessive calcium and phosphorus levels in the blood Excessive calcium and phosphorus concentrations in the blood can also cause itchy skin. If your skin is dry at this time and you have frequent urination, urgency, back pain, or even watery urine or little urine, you should consider the possibility of kidney disease. When patients with chronic nephritis enter the uremia stage, they often suffer from systemic skin itching due to the increase of urea toxins and protein derivatives in the blood.

2. Endocrine disorders:

For example, patients with hyperthyroidism have faster blood circulation in the skin and higher skin temperature, which causes itching, especially after sleeping. Diabetic patients have increased blood sugar, which reduces the body's ability to defend against pathogens and makes them more susceptible to bacterial and fungal infections, which can also cause itching.

3. Central nervous system diseases:

Patients with neurasthenia and cerebral arteriosclerosis often experience paroxysmal itching. When the lesions infiltrate the bottom of the ventricles in patients with brain tumors, they often experience severe and persistent itching, and this itching is limited to the nostrils.

4. Certain lymphatic system tumors:

Patients with myeloproliferative diseases, such as Hodgkin's disease, myeloproliferative diseases, etc., often have systemic itching.

Therefore, when skin itching is accompanied by other symptoms, you must never take it lightly. Don't treat the symptoms without addressing the cause. It is best to go to the hospital to find out the cause and prescribe the right medicine.