Почему не заживает рана на ноге после травмы?

I suggest visiting a reputed dermatologist for your problem. Based on the severity of your acne scars and pores and other factors, the doctor may recommend the best treatment option for you which can include a combination of chemical peels, micro needling, laser treatments, or topical skincare products. 

Pigmentations are due to various reasons, Have to find out the underlying cause and treating the cause would be the primary approach Along , will start with depigmenting cream and sunscreens. Would suggest - Peels ,hydrafacial MD to see faster results. You can also visit the dermatologist near your place or have a video consultation with best dermatologist in Jodhpur Lake, Kolkata. Hope this answer helps you.

It seems that the burn is rather extensive and does not heal well. I would suggest early consultation with a dermatologist or burn specialist. Do not use any more cream and let the wound dry. It is essential to keep the wound well cleaned, dressed and treated. Seek medical help at the earliest.

Psoriasis can be a bit challenging to treat but various treatments like medications, laser treatments, alternative treatments like homeopathy etc., avoiding triggers that worsen your psoriasis symptoms can prove useful. I suggest talking to your doctor for proper examination of your condition which will help in deciding which is the best treatment for your condition. 

Stretch marks are common and appear when the skin is stretched significantly. They can be purple, red, or silver, depending on how long they’ve been there. Causes include rapid growth, weight changes, and pregnancy. Solutions include using moisturizers, and creams, and maintaining a healthy weight. While they usually fade over time, they may not completely disappear.