A symptom of a stress-related skin rash includes hives, which are raised and swollen red bumps on the skin that itch, explains Healthline. The immune system causes the hives as a response to stress, although alcohol use and heat can also produce the tiny bumps.
An individual who already has rashes from psoriasis, eczema and rosacea can make them worse while under stress, states WebMD. The body responds to stress by producing cortisol, which increases the oil output of oil glands. This oil causes acne breakouts, rashes and other skin problems. A person under stress also tends to itch, scratch and pick at skin, aggravating the problem. To mitigate the effects of stress on skin and repress rash breakouts, exercise regularly to relieve stress, indulge in hobbies, take care of skin and get sufficient amounts of sleep.
Stress not only inflames skin and causes rashes, but it also affects the body in other ways by causing brittle nails, hair loss and excess sweat, according to Healthline. A stressed individual picks at her skin as well as her nails, rubbing them obsessively or biting the nails and cuticles, making them brittle and thin. Stress also stunts hair growth, keeping it in the resting phase when it should be in the active, growing phase.