Why Does My Brother Have Skin Bumps & Blemishes?

You may have a fungus infection in your groin. It may result in scratching and irritation of the affected areas. I suggest you go to a dermatologist who can diagnose and cure your disease.
 

Laser scar removal is not usually recommended for deep scars on the face. Please consult a plastic surgeon. Based on your condition and by physically examining you, he will tell you which is a suitable treatment for you. 

Hemorrhoids cause­ itchiness. They're puffy ve­ins close to the rectum. Along with itching, a pain or bulge­ may form there. Sitting a long while, pushing hard during bowe­l movements, or being ove­rweight can worsen them. For itching re­lief, use soft wipes, take­ warm baths, don't scratch. Always keep that area tidy and arid.

You are afraid of Stevens-Johnson Syndrome from drugs. It is a rare but serious skin reaction. Symptoms can be flu-like symptoms, a rash, and blisters on the skin. Medicines or infections can cause it. Before starting any new medicine, speak with your doctor if this is something that concerns you. They will be able to help you choose what might work best for you and watch out for signs of trouble.

You may be having a skin disorder known as vitiligo. Vitiligo is a condition in which parts of the skin turn white due to a lack of pigmentation. Problems like the skin shortage of pigmentation appear in white patches due to vitiligo disease. The methods of treating vitiligo can be quite difficult, but they can be handled with the help of some medicines like calming creams, phototherapy, and sometimes surgery. Not using sunscreen and the nervousness of a greater cause can intensify the symptoms. Visit a dermatologist for diagnosis and treatment.