Dr. Shafali Yadav is the best Dermatologist in Lucknow who specializes in the treatment of all forms of skin allergies including Hives(urticaria), swelling of face (angioedema), red lines on skin after itching or rubbing (dermographism), and others.
Typically “anything under the sun” can cause allergy. There might be intrinsic factors(factors inside the body- like antibodies, immune mediated etc.) or extrinsic factors(factors outside the body- like pressure, temperature change, cold exposure, sun, medicines, food, perfumes etc) ,which can cause skin allergies.
People who have allergies react to things that wouldn't bother most others. Skin allergies can be short termed or can take a chronic recurring course. Most of the times, they are not very serious, but they can be life threatening in the case of angioedema.
Patient needs to consult their doctor if they see an allergy recurrently occurring or if it seems life threatening. These conditions are not contagious.