Allergic reactions to antibiotics are a common issue, resulting in itching or welts on the body. It is essential to stop using the antibiotic at once and see a doctor. An allergist or an immunologist is going to be able to diagnose and manage the allergy.

Acanthosis Nigricans is what you are suffering from, a skin condition that causes your neck to darken compared to the rest of your body. This may occur if you are obese or have diabetes. It is important to work on reducing your weight and controlling your blood sugar levels. A balanced diet, regular exercise, and maintaining the cleanliness of your skin can gradually improve this problem. 

Lipomas are the benign, slow growing tumors of fat tissues. Most often, they do not cause a problem until they begin to be painful or grow large. Dermatologist can diagnose and treat lipomas. Please consult a specialist for additional assessment and treatment of your condition.
 

Yes, Montelukast sodium and fexofenadine hydrochloride are two of the medications used to cure skin allergies. Skin allergy patients usually get symptoms like itching, redness, and rashes. They perform this role by impeding the action of those substances on the parasympathetic nervous system. Consult an allergist before starting these medications for your skin allergies.

You may have a skin disease known as eczema. Eczema is a skin condition that develops itchy red lumps on the affected area. This case is common in children of your age. The reasons could be the problems of dry skin and allergic reactions. Use moisturizing lotion to keep your skin soft and stop it from itching. Sometimes the physician might prescribe a specific cream to help you with the itch.

This can happen from things such as stress, poor diet, or using harsh hair products. To grow your hair and make it silky again, try eating a well-rounded diet full of fruits and vegetables along with drinking plenty of water. Also, use gentle sulfate-free shampoos, conditioners, and other styling products on your locks.