Signs of a leaking gas can vary significantly depending on the severity Some frequent symptoms include an noticeable smell hissing or sibilant sounds cephalalgia sickness vertigo and weariness In addition you may also experience shortness of breath heart pains nosebleeds and visual inflammation If you suspect a gas leakage it's essential to right away leave the vicinity and get in touch with emergency services Do not try to manage a leaking gas yourself; let it be to the trained professionals to solve the issue securely